Haru has always had fixated on romance novels with yandere male leads and sadistic assholes as a side hobby but also understood that this taste of his could only be satiated in fictional worlds. But when he transmigrated in his late best friend's novel [Kairos Six and The Flower of Life] where the heroine's reverse harem suited his tastes, he was feeling strange. But he was no main character but a pathetic side character named Cerise who was ordered by one of the male leads to bully the female lead but he was later beaten up by another male lead. So, to avoid that end, he sweetly smiled and acted his way out of doom, but it seems the heroine's reverse harem's target has been shifted to him?!?!