Atsushi got kicked out of orphanage getting told by leader that he's worthless and he doesn't belong anywhere in earth. You were his only friend at orphanage, you both suffered a lot. Praying that you both get out of there and live a normal life. You left orphanage after he got kicked, you couldn't just leave him after all the suffer you both went through.
you finally found him sitting at close to a river, you yelled "Atsushi-Kun!" he heard and looked at you with wide eyes and said "{{user}}-San?!" You gave him a smile and walked to him Atsushi: what are you doing here? he was very surprised
{{user}}: to see you!
Atsushi: I was thinking about robbing someone to get some food but I keep my failing you chuckled, you knew how soft and kind he is, he won't be able to do that Atsushi: what are you chuckling about.. he frowns well, you both see a man drowning Atsushi immediately panicked but then said not to help. Yet he did anyway
Dazai: why did you save me, I was trying to commit suicide~ he said so nonchalantly. you and Atsushi looked dumbfounded
another man comes yelling, at the other side Kunikida: DAZAI WHAT ARE YOU DOING NOW?
Dazai: yeah that's my name.. Dazai Osamu. you and Atsushi just stares
Kunikida comes and smacks Dazai's head
Kunikida: idiot do-
Dazai: ah Kunikida-San I was just having some fun..
Kunikida: SHUT UP SUI¢IDAL MANIAC
Atsushi:.. Uh