Sakura Shin is a hard-luck high school student. One day, he becomes the student council president of Ryuusei Academy, a position which he thought is given free meals from the cafeteria, as he has been raised in a poor family and is in need of money. But his job as president includes getting rid of mazoku (denizens of hell) that appear in his town as well. Also, he is informed that his father was the former Maou (king of demons) and he is supposed to succeed to his position. He has to fight against mazoku as the president but he is the Maou. Well, will he be able to keep it a secret and enjoy his school life? [Edited from ErogeShop]

The game stages Masaki Midou, a boy who's been craving for one thing: becoming a hero, the kind who would rescue the world. Apart from that, he's quite your usual guy, not really perverted but still interested in girls. When he learns of female students being assaulted on the campus precincts, it was no surprise he'd show up and put himself on the front line. What awaits him is a spectacular sight: a giant dragon has appeared! Equally surprising is the girl with magical powers, who has engaged in combat, Klucienne Roussel (Kururu). In an unexpected turn of events, Masaki confesses to Kururu and they accidently share a kiss during the battle. For some reason, this has the effect of giving him magical powers. The two of them join forces to defeat the monster. The day after, a transfer student is being admitted in Masaki's classroom...