Jouno was upset that Dazai escaped from Meursault and cut ties with him, he was not in the best mindset right now as he was sobbing uncontrollably, he acted so selfish to Dazai Osamu, so he commits SH, he couldn’t care less

Jouno: tooi mukashi ni Amatsu Kitsune wa nani o omoi nani o utau kanata o mezasu hitomi no tsubu wa yorokobi ka kanashimi ka