Let's Take Care of the House
Mayu attempts to help Reika with the housework, only to find a hidden passage instead. They get trapped within the passages for most of the day, only to be abducted by Ryōko for slacking off when they finally escape.
Aired 26/10/2007EP 4 - Let's Take Care of the House
2007
Good Luck! Ninomiya-kun
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. 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.
(Source: Wikipedia)