White Noon, Black Night

A young man who has a tendency to live in his own fantasy world. Niinuma fell in love with the elite company, Obata. The first night he spent with him was gentle and sweet. Niinuma could see the different side of him. He surrendered to the intense pleasure he felt that night but one day he hears a rumor about Obata "He's a Prince in the Day but a Beast in the Night". What's his true appearance?