Hinako Momose isn't very good with men and had been going to all-girls' school. For Hinako, the high school that she got into is a former all-boys school with only 4 girls who got in (including Hinako). Poor Hinako is getting teased by Mizuki, a boy who sits next to her in the class and the class representative Shun gives cold glares at her. What's going to happen to Hinako's school life?!