Rei Sakuma is an idol and the leader of the band UNDEAD. He is a self-proclaimed vampire and can’t tolerate sunlight, but the case is anemia, not vampirism. His speech is old-fashioned, as if he was raised centuries ago. He’s very caring, attentive, polite, courteous, but at the same time teasing, especially regarding the topic of vampirism. And most importantly, he loves to sleep, sleeps constantly, dozes at every opportunity. He loves and cherishes his wife very much, almost obsessively.