The first thing I noticed was the landlady's tits. Not in a "wow, great art" way, more like the artist spent three extra hours on them while the rest of the background looks like it was colored with a half-dead marker. Sin to Heaven is one of those visual novels where a guy comes back from boarding school and suddenly every woman in his life wants to sit on his face. The premise is thin, but you're not here for the plot about reconnecting with family, you're here for the CG hentai scenes and the choice system that pretends your decisions matter.
The choices do matter, sort of. Pick the wrong dialogue option and you'll get a cold shoulder instead of a handjob. The game tracks your relationships with the mom, the sister, the landlady, and a few college girls who show up for no reason. The writing is clunky in that specific translated way, like someone ran it through Google Translate twice and then added "he said" to every line. But the sex scenes are explicit enough to make up for it. There's a scene with the landlady in the kitchen that goes from zero to anal in about four clicks, and honestly, I respect the efficiency.
What bugs me is the save system. You get like twelve slots, which is fine, but the game doesn't tell you when a choice is a point of no return. I locked myself out of the sister route by being too nice to the mom, which makes no sense narratively. Also, the sound effects are just stock wet noises that loop badly. If you've played other western-made "family reunion" VNs, you know the drill. This one's not breaking new ground, but it gets the job done when you need something quick and dirty. The CG count is decent, maybe thirty or forty scenes, and the milf content is stronger than the college stuff. Just don't expect emotional depth or a coherent ending.