Kenichi and Asuka are siblings who lost their parents at a young age and grew up in an institution. Kenichi has changed jobs several times, eventually settling into his current job as a worker at an industrial waste disposal site, which is a tough job. One day, Kenichi returns home with an injury to his face. Seeing him, Asuka's concern reaches a boiling point and she goes to check on the workplace. There, Asuka witnesses Kenichi being assaulted by his coworkers. The colleagues, with their devilish expressions on their faces, are aroused by Asuka's cute appearance and pin Asuka down right in front of Kenichi...