A demon named Shion came to the human realm because of a trial that will decide who'll be the king of the underworld. However what he needs to do to prove himself worthy of such title may prove to be too difficult for Shion…?!

"My classmate Yura-kun is always languid. He might be a vampire…" Kyouko's wild notions actually turn out to be true!! Once Yura-kun finds out that she has a "rare blood type", he begins to approach her. Are his actions out of love? Or is he just out for her blood, following his instincts? She's being pushed around by Yura-kun, who does everything at his own pace!!

‘Why am I always embarrassed and helpless in front of this person?” Perfect at housework, high school student Arisu’s purpose in life is taking care of her next-door neighbour, middle school student, Yuutarou. One day, Yuutarou’s uncle, Touma makes an appearance and thus, Arisu begins heart-wavering days torn between an older and younger boy――