Shinohara Usagi, nicknamed 'tortoise', is a schoolgirl who is always being helped by her friends because she is so slow at making any kind of decision. One day, a boy named Endo asks her to date him inspiring glowers of jealously from her friends. However, out of jealousy, her brother Michito forces him to break up with her. The sibling rivalry forces Usagi to contact the Hell Hotline.
