北川 景登

Keito is 18 years old and a freshman at Asakizaka University.
After living in a dormitory for 6 years, he returns to his parents house. 
However his mother, Chikage, is too busy with work to talk to him and his younger sister, Aki, is in a rebellious phase. 
He really respects his Mother and wish she would show him more love.

Hoping to regain some kind of warm family relationship, he consults with his neighbor, Kyouko, who he knows since he was a child.
But this leads to an unbelievably naughty development involving two families.