"Big Brother... I'm so happy... ♡" T-REX, the production team behind super-erotic titles, adapts the smash-hit "other-dimensional impregnation" adventure game into an anime! The protagonist takes a teaching post at an academy where the elite gather. However, he and the heroines find themselves plagued by "Meikoku"—a mysterious spatial phenomenon that disrupts their minds and turns them into insatiable, lust-crazed beings at certain times of day. He must impregnate the headmistress, the nun, his childhood friend, the disciplinary committee member, and the delinquent students to save them from the academy's clutches!