Shungo is a normal high
school student living in a huge house. One day, his sister Ryoko sends
Mayu and Mikihiro Tsukimura, two siblings, to live with him to help Mayu
overcome her problem. Mayu's problem: androphobia (fear of men), and
Ryoko wants Shungo to help her overcome it. How? By making Mayu and
Shungo share the same room, bed, and even take baths together. To make
things even worse, Reika Hojo, the student-council chair, somehow ends
up becoming their maid.