"Pocket Waifu" presents a simple but direct premise: it's an idle game centered around collecting and developing relationships with various "waifus." Gameplay revolves around leveling up these characters, with the primary reward being the unlocking of new erotic scenes and outfits. The core loop is focused on progression and visual gratification, appealing to players who enjoy collecting and seeing tangible results from their investment of time, even if that investment is primarily passive.