Minna Atsumare! Falcom Gakuen

A strange disturbance pulls famous heroes and villains from many Falcom worlds into Xanadu, where their grand adventures are replaced by something far more troublesome: school life. Under the watch of an unlikely faculty, legendary swordsmen, adventurers, and former enemies are expected to behave like ordinary students. Their clashing personalities make that almost impossible, turning every lesson into absurd comedy.