Erin is your quiet and reserved imouto (younger sister). One night, she come to your room as she has something to say to you.
Umeko is your younger sister who likes to film herself as a cat girl in a maid outfit. Recently she began to ask you to join in making her videos.
Meiko is your younger sister by just 2 years. You are her onii-chan.
Your parents died in a car crash years ago. You take care of Meiko alone after that. Since
Miri is your daughter, who seems never to be able to be separated from you.
Miri is a shy 18 years old girl. She is a loner at her school.