After defeating Shishitoren, Sakura Haruka finally gets to experience some normal days at Furin High. After meeting some powerful classmates and astounding upperclassmen, Sakura gets elected the Class Captain, blossoming some changes in Sakura himself. Meanwhile, a dark shadow looms over one of Sakura's classmates. To save his friends from the infamous team, KEEL, Sakura and his class jumps into action!