Shizuo is the delegate of his class and always has good grades, but is completely unable to realize what is happening around him. His only friend is Masato, who lives nearby and has known since he was little. But this friendship is not easy! Shizuo is forced to go wake him up every morning so he is not late for class, his grades are almost always in red, and as soon as he takes his eyes off of him for a second he catches him around with his thug friends ... So, Shizuo believes he is essential in his friend's life. But one day, while Masato's parents are out, they end up watching an AV that causes a somewhat embarrassing situation and from then on things get worse ...

1-3. Gyakuten Hierarchy!
4. Sawaruna Kiken!
5. Zenbu Kudasai
6. Kawaii wa Tsumi