Kami To Sengoku Seitokai

Katsuragi Musashi, known as the “Unsinkable” for never losing a fight thanks to a string of lucky incidents, arrives at school a month into the semester. On his first day, he steps in to save his old friend Kaoru and knocks down two attackers, only to be stopped from facing six more by Kagura Mami, the student council’s vice president and a popular idol who usually helps no one. Later, while fleeing his childhood friend Akane, Musashi finds an old school building and a mysterious door that will not open. What happens when it does changes his life and affects those around him: Kagura names him successor to the student council president, then moves in with him. Musashi and other chosen students gain supernatural, animal-like powers—and he also grows a tail.