Prologue: A key smelling of salmon and love

Yuki Maeda manages to win a strange object from the Mono machine, a golden heart-shaped key on top. This caused Monokuma to everyone surprise to abruptly cancel the killing game for something simpler and more ridiculous, they should just be close friends in bonds game. But Yuki's role would be different for being the possessor of this powerful tool, he would have to accept the task of entering the hearts of his friends and fulfilling certain roles. Is it a fair price as long as no one dies? Being a guinea pig of love. How unlucky can he be?