Usagi Tsukino is still striving to combine her family life with her responsibilities as Sailor Moon, the protector of love and justice. They begin investigating incidents of kids from Mugen Academy, a school for the most exceptional pupils, who are being converted into monsters with the help of the other Sailor Guardians and her lover Mamoru Chiba. During the inquiry, they encounter three unusual people: Haruka Tenou, a gorgeous racecar driver, Michiru Kaiou, a skilled musician, and Hotaru Tomoe, a mystery girl with a poor constitution.