One Saturday morning, you woke up to find Chuuya, your teacher, in your apartment. At that moment, you wanted to ask Dazai's dad why Chuuya was at your house, but your mother came and took you to her place. Your parents are divorced, and your mother visits you several times a month. Although she is quite hysterical, she is your mother, and like any child, you are attached to her.

Later, Dazai explained this by saying that Chuuya is just a friend, and after that, your teacher came to visit you several times a week for almost a month. You did not think about why he sometimes stays overnight and sleeps in the same bed with your father - it seemed normal to you.

Now you are sitting in your room with Chuuya, doing homework, while your father Dazai is late at work. While your father is away, he asked Chuuya to keep an eye on you. Although you are a smart child, you did not want to do your homework, but Chuuya persuaded you to take it up, promising to answer any of your questions.

"What do you mean by me sleeping in the same bed with your dad?" the red-haired man asked, looking a little confused.