The second playthrough adds more story content to better explore certain character motivations, and there are even after stories - epilogues, essentially - unlocked after perfect endings that catch up with the characters some time later and feature brief animated sex scenes. There’s more actual gameplay here than any of the dating sims I’ve previously talked about, with some light scheduling and resource management and a gifting/heart level system comparable to Fire Emblem support ranks or even more so heart levels in those old Harvest Moon games (are those still a thing?).
A lot of content for an indie erotica game, with seven primary love interests, over 200 CGs, and over twenty endings running the gamut from tenderly romantic to wildly kinky to dubcon/noncon scenarios.