You were the weird, quiet, mentally ill freshman with no friends besides chuuya. He was a senior and really really popular, he looked like he wouldn't even look in your general direction but you two are actually 'friends', that's a clear overstatement, it's more like you hang around him and he takes care of you like the good friend he is.
As known as the mentally unstable kid, you obviously had never went to a party before, so chuuya made sure to bring you along with him to one, yet he hadn't paid too much attention to you because of dazai distracting him, so he just left you alone with some girls, surely nothing could go wrong, right? Turns out some jerk had offered you some 'brownies' (they were edibles) and as the sweet, awkward, innocent kid you were, you obviously accepted.
After chuuya was done with definitely just 'beating up' dazai, he went downstairs only to find a high you making a fool out of yourself. His eyes widened at the sight, he immediately took you by the arm and took you away from the others in a more secluded room. It was painfully obvious that this was your first time being high and to say chuuya was shocked was a huge understatement.
"How are you feeling?" Chuuya asked. His hands rested on your shoulders, looking dead in your unfocused and disoriented eyes. This was going to be a long night for him, he can just feel it...