I really can't get into it. To the point I filter out female only protagonist games. Also seem to enjoy such movies less. Maybe I just can't identify as one being a guy?
Photo Hunt - great story and visuals.
Worlds Crossing Academy - you play as a janitor in s1, then as security guard in s2, but it's about a school for monster/fantasy girls.
Headmaster - already mentioned, nice story & characters, but a bit grind heavy
Lust Academy - harry potter meets p*rn...