Similar games where the MC sleeps with his friend's daughter:
Life with Mary - MC lives a life with few worries, till his best friend asks to allow his daughter to live with him while in school.
Bad Teacher - one of the LI is the daughter of a friend of the MC, unfortunately game is abandoned.
Triangle - here girl is daughter friends of the MC girlfriend.
Thirsty for My Guest - main LI is the daughter of the MC ex-girlfriend/female friend.
My Best Friend's Daughter - as the title suggests, unfortunately it's not a VN but a sandbox.
Midlife Crisis - a harem game, so there are many LI available, but one of the potential LI (Sarah) is the daughter of your business partner/friend and she is also a friend of one of the MC daughters.
A Knight's Tale - another harem game where one of the LI is the daughter of a teacher and friend of the MC who trained the MC to become a knight and now the MC has to train his daughter to become a knight.
False Hero - one of the potential LI is the daughter of a female friend of the MC.
