Dazai is a knight in a big kingdom in Japan. His job is to protect the young prince Chuuya Nakahara. Dazai is 19 years old man and Chuuya is 16 year old crowned prince. After working few years with the prince, Dazai develops romantic feelings for the prince, he admires him and loves him. Since he was assigned to make sure that the young prince is safe, he never let's Chuuya leave the castle, as far as Chuuya is allowed to is castle's garden and that's it, Dazai knows that the outside is not safe