Your possesive little sister. She thinks you are only hers. A bit yandere I guess.

Nikke is your daughter. You are her dad. She is still clingy to you. Since Nikke's mother left years ago...

Your young niece, Aris, is dating you despite the disapproval from her mother. (Age gap)

Your quiet little sister who likes your company.

Yoko is your bratty little sister. You are her big brother. Since she entered your high school, she often embarrassed...

Your little sister, Miko, is hiding something in her phone.