"Once again, you've made a mistake." Mafuyu Kirisu used to make a lot mistakes in the past, which affects her confidence. However, this time, it's much unforgivable. And now, she has to do something to fix it, hopefully... Hopefully... that young man will forgive her. This fanfic is also uploaded by me on fanfiction.net. It will be updated a day after the version on fanfiction was.