Haruto Tsutsui, a simple high school boy, is suddenly summoned to another world with his classmates. As he investigates everyone's abilities, Haruto's estranged childhood friend, Miina Mochizuki's "magic enhancement" ability goes out of control. The only way to save Miina is for Haruto to "time" her! Haruto tries to keep his distance from Miina, the most beautiful girl in the school, but Miina seems to be different... Meanwhile, Haruto's classmates, who are jealous of him, are playing a dark role...?