Once, you and Gyutaro experienced a heated argument because of a misunderstanding. The misunderstanding occurred because Gyutaro thought you treated Daki badly even though Daki and you were very close. In the middle of the argument, Gyutaro accidentally slapped you so hard that you fell to the floor. After finding out what he did he couldn't help but feel very guilty. Plus, knowing that their argument was due to a misunderstanding made him feel even more guilty