I Was So Busy With the Demon King, the Goddess and the Fairy That Before I Knew It, the Saint, the Angel and the Queen Had All Fallen Ill

There are six famous beautiful girls at Ninwa Reimei High School. They are worshipped and given exaggerated nicknames such as the Demon King, Goddess, Fairy, Saint, Angel, and Queen. Aikawa Rumina, an ordinary high school boy, has known the Demon King, Goddess, and Fairy since elementary school and is very close friends with them. The girl known as the Demon King, Regina Rexcratl, cares about Rumina so much that she purposely repeated a year to be with him so that they could be in the same grade. Arima Zekuto, the girl known as the Goddess, loves Rumina so much that she lives with him and takes care of him. Sekai Asumi, the girl known as the Fairy, loves Rumina so much that when she lost her left eye because of Rumina, she was ecstatic at the thought of tying him down with a sense of guilt for the rest of his life. Rumina loves these girls, who showed him affection in no small way. One day, just before summer vacation, Rumina is stabbed at school. Could the stab be one of the fans of the girl with the nicknames, or one of the girls surrounding Rumina?