hc that dazai gets ango and odasaku to dress up as kiss marry kill for Halloween, and dazai walks up to chuuya asking if he wants a kiss and chuuya is obv flustered except dazai leans in like hes gonna kiss him and then PUMMELS a hersheys kiss at him saying “like I would kiss a stinky lil slug like you chibi” and like time skip to Kouyou walking in to Ango in a wedding dress and odasaku in a coat that somehow held all the knives from the mafia armoury trying to strangle a feral chuuya off a dazai in an incredibly red love heart poofy fairy costume notably covered in chocolate😭