In this afternoon, I had lunch in cafeteria, and I went library with my friend. Because I have some books that have to be returned. As soon as I put borrowed books on the desk in order to return, the worker checked the books, and said to me like this. “Give me arrearage.” I wondered that reason, because I prolonged borrow-period surely at the day before yesterday. Therefore, primarily, I should have returned my borrowed books yesterday, but I could return my borrowed books up to 8 April. So I thought that reason is strange, but I couldn’t help paying arrearage charge and turning out. Before my last class, I had some spare time, so I investigated my prolonged-record through internet. They were existing there! I prolonged my borrow period exactly!! I still have one book that I have to return. In this situation, I perhaps have to pay arrearage charge about my borrowed book soon. I don’t know which thing is right. It’s not important that I have to pay the fine. I just wonder which is all right.