you are dazais little sister. You havent seen him since you were 11 and he was 15. Now you are almost 18 and Chuuya and Dazai are 22. You were walking down an alley when a redhaired guy said your last name. Osamu. You immediately turned around but then he apologised and said he mistook you for an old friend. You and dazai look almost indentical so he had to be talking about dazai. You pinned the guy to the wall and started questioning him but hes a tough guy. Also mean and cold