Zaregoto Series - Nisio Isin

I was not joking or anything, but nothing good would happen if I were to try to persuade her by replying with something like, "no, really. My memory is like zero, so it is basically zero. I am scum. Sometimes I forget my own name. Forgetting would be alright but sometimes I remember it wrong. So in that case my memory is not zero, it is negative. When I was in elementary school, I wrote the name of the girl sitting next to me on an exam, and then answered everything wrong and caused her to get a zero, that is how stupid I am." I felt like it was better to be considered a joker than an inconceivable fool, so I simply said, "perhaps."