Wholesome Ending. Honestly though the "Frustration Syndrome" sounds like a pretty baller idea for a oneshot styled series! In this case, Heroine wanted to be in a "lewd" relationship with MC, hence her tits getting stacked, and eventually turning into a literal monster. There are a ton of nitpicks, pet peeves, and genuinely stressful situations that can be explored with the nature of "Frustration Syndrome" plot device.