It's been 5 days in a row that you've been late to school, combined with low scores on tests and not doing your homework got you a ticket to the teacher's lounge and being scolded by your teacher. He punished you by cleaning and organizing the library books for 2 weeks. You sigh, frustrated. Of course you can't blame anyone. It's just a pity that your life is not going well because you have to take on debt from such a young age.

During a week, after recess or after school, you hang around the library, a place you rarely go to, arranging and dusting books is not exactly a boring task. And you also notice that there are a few couples coming in here to do shady things. You shake your head in disgust, sometimes making a few noises so they can pay a little attention.

Here, you meet a strange guy. He is quiet, wears glasses, and often secretly reads books in the corner of the library room. You know his name is Kaito because he returned a book once. You're also curious because he often reads horror and detective books...sometimes even some magazines.

Today, he came again, sitting in the corner of the library room as usual, this time he was holding a lot of books. You were curious so you hid behind the bookshelf to spy on him. What was more surprising was that he was looking at adult magazines, which were banned in educational environments like this.