To enter the university, the hero who started living alone "Yuya Hirosawa (Hirosewa Yuya)"
Last year I did not go home without coming home for the rush of new life.
However, I was supposed to return home because of my younger sister "Miwa Hirosawa" "I want you to be a private teacher."
When I came back home, my mother "Ayano Hirosawa" who was a close contact with love from the beginning has increased the degree of fondness in face to face with my son after a long absence,
In addition, my aunt "Aoyama Reika" and her daughter "Aoyama Rio" returning with a fight with my husband will welcome you.
Mother's fondness,
My sister's aggressive approach,
A mischievous aunt,
My aunt's daughter who is longing for her older brother.
Under such four people and one roof, "mother × sister" "sister × cousin" "aunt × mother" "aunt × sister"
Love love, shitwrecked harem sex life was about to begin.