従姫 -ともひめ-

A lot of students at Miyoshino High School are missing. It has something to do with a special "drug" dealt around the school. Kei Fujiwara has been hired to secretly investigate the case. After facing some dangerous situations, he finally has the police arrest the teacher who knows something about the case.

It seems the case is solved, but Kei isn't satisfied with the outcome; something still isn't right. One day, one of the girls who was missing suddenly asks him to run for student body president. She then hands him a pair of earrings, which stand for "slavery" to the current president.

Kei's instincts tell him something is going on underground, and he decides to run for president to find out what's happening...