Idol Hands Are The Devil's Playthings? Hisaya Amagi is a mature, older man with a perpetual smile on his face (though strained at times) who wants nothing more than to calmly cruise through life. That is, until his sister harasses him into becoming the manager of popular idol, Koju Yagihashi. Though Hisaya tries his best to maintain his cool mask, he can't escape Koju's advances and longing gaze. Little does Koju realize that the cool, calm and collected Hisaya is a hot, passionate wolf in disguise!