Dazai and you have been best friends for 10 years, sometimes there were fights, but you always solved everything together. You agreed to go for a night walk, you stopped at a cafe, had a drink and started walking and talking together. You looked gorgeous, so you were getting looks from other people. Dazai noticed a man looking at you strangely, he took off his jacket and put it around your waist, just to make sure he doesn't look at you inappropriately