Under One Roof: Step by Step is that kind of story that looks innocent for like five seconds, then suddenly you are sitting in front of the screen thinking, “Ok, I really should not be this hard from doing laundry and talking about rent.” It is quiet, slow slice of life, nothing explodes, nobody has magic powers, and still it gets under your skin. You’re this guy sharing a small house with three girls, each one wired completely different, and the game just keeps throwing you into these everyday scenes that slide from cute to horny in this really sneaky way. Breakfast chat about coffee? Five clicks later you are staring at her bare thighs because she forgot the shorts. Or she “forgot.” The whole thing is mostly conversations, tiny choices, and watching how your relationship with each girl shifts when you say something sweet, or when you absolutely fuck up and joke at the wrong time.

What surprised me is how normal some of the sex feels. Not porn-normal, like real-life awkward normal. First time I got a vaginal scene with one of the girls, it was not all “instant pornstar mode.” There was the nervous small talk, her checking if the door is locked, you trying to unhook her bra and failing like an idiot for two tries. The game actually lets that moment breathe. You see her legs shaking, not from some fake screaming, but from tension and excitement, and when he finally slides in, she doesn’t moan like a hentai character, she gasps, stops, adjusts. Then later, when you finish inside her, the creampie is not just a money shot. She lies there, breathing heavy, looking at you with that “you really did that” face, and the whole mood is this mix of warm, dangerous, and slightly stupid. I liked that a lot more than I should. There are softer romantic routes too, with real build up, hand holding, quiet cuddling on the couch, stupid jokes that actually made me laugh out loud once, then the same girl later is sitting on your lap grinding slowly while teasing you that you get turned on too easy. Very realistic, very unfair.

The relationship system is simple but not brain-dead. You choose who you spend time with, who you tease, who you comfort when shit goes sideways, and the game remembers. Say the wrong thing in a dramatic moment and she closes off, and you feel it later when she pulls her foot away when your MC touches it under the table. Speaking of feet, the fetish stuff is not subtle at all. One of my favorite scenes is not even full sex, just her sitting on the bed in oversized hoodie, bare legs, asking you to massage her feet because she is “so tired.” You start innocent, then she places your hand exactly where she wants it, and it turns into this slow, filthy footjob that still feels like a private joke between lovers, not just a kink checklist. She rolls her eyes, calls you a perv, but does not stop. The funny thing, the humor and drama sometimes crash together in weird timing, like a heavy emotional scene followed by a goofy underwear argument, and it feels slightly off, but in a way that reminds me of real life when people cope by joking at the wrong second. UI is fine, nothing fancy, I kept clicking the wrong choice once because the hitbox felt weird and got mad for a moment, then forgot about it when she climbed on top of me and started riding slow while whispering how she doesn’t want the others to hear. It is that kind of game. One minute you are arguing about dirty dishes, next minute there is cum dripping out of her while she kisses you like she actually loves you. I believed it more than I expected.

Rumors always sound stupid until you are the one they whisper about. This game throws you into one of those sticky school legends, the “there is a satanic cult behind the gym” kind of bullshit, except you actually trip over the damn book they are using. Not a cute grimoire with sparkles, more like something that looks like it smells of old cum and candle smoke. You crack it open for a laugh, and the first thing it gives you is the power to make the class virgin blush so hard she almost creams herself in the middle of an “examination” scene where the teacher leans too close, her tits brushing your arm, and you realize the book is not just edgy goth decor. It lets you push people, twist their lust, nudge their fears, and at first you just use it for small shit: making your best friend text you late at night with “I had this weird dream, why were you watching me in the shower?” while you are literally watching him through some voyeur spell on your phone, zooming in like it is some cursed Pornhub live cam. The game plays like a mix of visual novel and sandbox, you wander around school halls, club rooms, that empty classroom behind the science lab where the “mystery club” girl hides her monster girl hentai doujins, and every choice you poke in the text gets a horny consequence ten minutes later. Sometimes it is just teasing, a milf teacher accidentally pressing her big ass on your desk while bending over the board, sometimes it turns into full on corruption, like you mark a shy futa class rep with a little symbol and next time you see her she is in the bathroom stall, stroking a throbbing cock that looks too heavy for her thin legs, biting her lip and mumbling your name.

The story pretends to be about this “evil power” and responsibility, but half the time I forgot the cult plot and just chased who I could break or save or both. You can go playful, using the book to make girls horny at the worst moments, like forcing a strict nurse to lactate during a routine health check, milk stains spreading on her white top while she clenches her thighs, then suddenly she is grabbing your hand and shoving it under her skirt, muttering how this is “for science.” Or you lean into full NTR stuff, using blackmail photos and the book’s little curse tricks to push a sweet romance into pure cheating. There is one brutal route where your “best friend” tries to confess to his crush under the cherry tree and you quietly tweak her feelings so she accepts, then later you drag her into a storage room and she is on her knees around your cock, choking and crying because she knows she is his, but the spell makes betrayal feel like a delicious punishment. The game loves mixing that hurt with the horny: a loyal girlfriend getting pounded by a big black cock you summoned from some “monster” page, your corrupted class rep in a gangbang bukkake scene with faceless students dripping on her glasses, the principal on her knees in the occult club room giving a sloppy oral exam as if it is normal curriculum. There is futa, femdom, crossdressing sissification stuff where the book flips your own body, giving you a fat futa dick for one route, soft tits in another, forcing you into a skirt while a female domination demon spanks you until you are hard just from the pain. One day you are fingering a shy monster girl by the pool during summer vacation, her tail curling around your wrist as she begs for creampie, the next you are watching a furry club president hump your enchanted sex toy in the empty gym. It is messy, horny, a bit mean, and the book never really feels safe; every time you use it to make someone moan louder in a titfuck or a footjob scene, there is that tiny line of text hinting that maybe the book is also rewriting you, turning a “regular student” into something closer to the cult freaks you laughed at in the first place.

You’re sitting there, phone in hand, thinking it’s just another cute little “help the girl get ready for her school exam” sim, right? Hair, makeup, outfit, some dialogue choices, a few horny CGs later. Easy. Except the “girl” the game wants to send to that exam is you. And you started this story with a dick, a very normal male student brain, and zero idea why the fuck you’re suddenly being measured on eyeliner technique and how well you can sway your hips in a tight skirt without flashing half the class.

The game opens quiet, almost boring, and that’s what hooked me. No instant blowjob tutorial, no “here’s your harem, pick a hole.” Just a nervous morning, a school setting that feels too normal, and weird little hints that something is off with your body. The first time you realize your reflection in the mirror doesn’t match the way you remember yourself, it hits like a small car crash. The dev takes their time with it, slow corruption of gender and morals at the same time. First it’s “just crossdressing for this one exam.” Then it’s “well, you need to practice walking in heels, let the teacher help your posture.” Then somehow you’re bent over the desk, feeling your ass slapped and graded like part of the curriculum, and the worst part is your in-game thoughts start to enjoy it. Those internal monologue lines when you’re getting groped in the hallway, and you catch yourself wondering which of the boys has the biggest cock, were dirtier than the actual CGs for me.

I liked how the game makes you complicit in your own downfall. You pick the lipstick shade that later gets smeared during a messy oral exam. You choose to act “a bit more submissive” to get a better score, and suddenly you’re on your knees between two classmates, throat used like a warm hole while the teacher pretends not to see. They pretend badly. There is some netorare shit going on, too, but sideways: your old male identity kind of feels like the one getting cuckolded as your new girly body gets filled, stretched, creampied. One run I had my “good girl” reputation used as an excuse to parade me in front of older staff, a humiliating little exhibition where they check if the “student” is ready. Gloved fingers spreading you open, comments about how tight you are and how a nice big black cock will fix that. Another run I resisted more and the corruption took longer, with more teasing, more “accidental” touches, more voyeur scenes in locker rooms and bathrooms, like the game was punishing me for not giving in fast enough by cranking up the sexual harassment.

It feels janky in spots. Some AI CGs look amazing from one angle and kind of cursed from another, like the face doesn’t fully match the body, or the hands are doing that weird too-many-fingers thing if you stare too long. I still stared. The summer vibe is weirdly relaxing though, all bright classrooms and sunlit corridors while behind the scenes you’re being turned into the school’s futa toy or the class’ shared virgin project, depending on choices. There is this one branching bit where you can agree to a “private tutoring” session with a strict female teacher and it starts as normal exam prep, then she makes you spread your legs on the chair, checks how wet you are “from stress,” and then uses you until you’re shaking, all while lecturing about responsibility. Female domination scenes like that felt personal, intimate in a fucked up way. Then later the same character can watch you get stuffed by multiple guys at once, barely saying anything, just writing notes like you’re a lab rat. It messed with my head in a good way.

The story is mostly kinetic in pacing but still manages to feel like a sandbox for your humiliation. One time I focused on being the perfect obedient girl and ended up pregnant from an exam “reward,” cum dripping out in a medical examination scene that treated your belly like a test result. Another time I pushed for more wild stuff and unlocked a futa transformation path, where you keep a cock while having this soft, thick ass and big boobs, so they test how many students can fit inside or around you at once. I still have the scene of being pushed up against the classroom window in my head, skirt hitched, some monster girl-looking classmate pounding me from behind while random NPCs walk outside, clueless. The game doesn’t rush those moments. It lets your thoughts spiral, your shame grow, your arousal betray you. It’s messy, inconsistent, a little ugly here and there, but the slow burn into full sissification and “everyone uses the exam girl” fantasy hits way harder because of that.

Sex in space always sounds kind of goofy in my head, but this one actually leans into that mess instead of pretending to be “hard sci-fi”. You start as this assistant to a big-shot senator on Earth, while Mars is trying to become its own thing with its own rules, own calendar, own kinks. Your boss is all about shutting down polygamy and polyandry, making marriage “pure” again, and then your character is constantly surrounded by people who very clearly don’t give a shit about that. So half the time you’re writing dry political speeches and the other half you’re secretly watching someone get their ass smacked red in a private office on a station orbiting Venus. Kind of a mood shift, but it works better than it should.

The sex itself is not shy at all. Big tits, big asses, a lot of focus on slow touching, groping, hands sliding under clothes during “serious” meetings. There are animated scenes where a calm talk about Martian independence suddenly turns into the candidate bending forward over a desk, skirt pushed up, and the protagonist’s hand comes down on her ass again and again while she’s trying to keep her voice steady. The game loves mixing politics talk with dirty stuff like that. Some routes get really messy with cheating: you can be the side piece for a married Martian diplomat, watching from a hidden camera while her official husband is busy somewhere else. There are scenes where you sit alone in your cabin on a Mars shuttle, jerking off while scrolling through secret footage on your mobile, watching your lover ride someone else’s cock and pretending you are okay with it. That voyeurism and netorare angle hits harder than I expected, because the story actually spends time letting you like these people first. It stings when you realize she is moaning louder for the other guy than she ever did for you. There are oral scenes where you feel less like a hero and more like a consolation prize, sitting on the edge of a bed while she goes down on you right after coming back from “meeting her campaign donor”. And sometimes the interracial angle pops up in a way that is not very subtle: Earth-born, Mars-born, different skin tones, different bodies, your character stuck in the middle trying to pretend this is all just politics. The game jumps from romantic cuddling after sex, where she snuggles into your chest and actually looks soft and in love, to cold, distant masturbation scenes where you’re alone again, jerking off to something on your phone because she did not show up. The romance has sweet bits, but the cheating keeps cutting through it, and somehow that mix of warmth and betrayal feels very on-brand for a future where love and law are constantly pulling in different directions.