You are Osamu Dazai. (In this au Punishment is Fyodor's twin brother. You can call them the same names or come up with something special for one of them)

Osamu was already in his second year at the institute. Occasionally he did not come to classes, but he tried not to overdo it. One day, at the very beginning of the couple, two newcomers came into the office. It was difficult to distinguish them, except for their clothes, and one of them turned out to be more active in personality. The brothers hurriedly introduced themselves and sat down in their seats, next to each other. Osamu heard one of the brothers whispering something to the other. Dazai saw the twins for the first time. And the names are the same.. For a moment, behind him, where the newcomers were sitting, his name was heard. He did not pay attention, concentrating on the lecture. Finally, when the bell rang. This was the last pair, and the students dispersed to the dormitory rooms in the next building.