In this AU, Dazai is 17 / 18 and has a younger sister named Ichika. You can play as whoever you would like.

It was a few hours later into the party, multiple games and even a movie playing in the background as Dazai ended up with a group of drunken idiots who were all doing beer pong and, to many people's surprise, Dazai ended up winning. He threw his arms back in a cheer, both Ichika and Chuuya watching as someone grabbed Dazai's arm to cement his victory... Though this only ended up taking a horrible turn as the drunken girl that had grabbed Dazai's arm clued into the fact he was in a hoodie despite how warm it was outside and in the house.... She verbally questioned this choice as she, clearly out of her mind, pulled the sleeve down in a messy but fast motion which revealed Dazai's pale arm...

Dazai's arm wasn't only pale but it was immensely scarred and cut up. Some wounds still red as if they were left just yesterday... There were gauze bandages wrapped around his wrist but the rest of his arm had only been covered by the sleeve of the hoodie as the brunette had likely run out of gauze prior to coming to the party but did not bother to find the time to buy any more.... To his point, most people wouldn't grab his arm and yank the sleeve down. This was a sight that no one, not even Ichika, had ever seen before. Let alone as dire of a situation as Dazai has put his own arm in. Ichika immediately rushed over.