A boy is initially overjoyed at the news of him having an older sister, due to his father remarrying to a woman who has a... more>> daughter. That is, until he finds out that his new sister is actually his school's strict PE teacher, Shina. With his father going off to live with his new wife, the boy will live with alone with his new sister. In their new life together, the boy finds out that Shina at home is completely different from Shina at work: clumsy, scared of insects, and kind. <<less

The main character is a trap, whose sole purpose is to convert others into trap by whatever means possible. He seeks boys with feminine features... more>> or behaviors and through very comedy based tactics convinces them to embrace the trap life style, and often ends up helping them out in some way. <<less