Rengoku no Karma

Story

Makoto does not have it easy. He gets bullied in School and has problems with his father due to skipping School. His outlook on life brightens when Kirisaki, a girl in his class, compliments his drawing skills. A while later he sees her getting harassed by the ringleader of his bullies. He decides to intervene, but is cut short by the revelation that she is the ringleaders girlfriend who incited the bullying in the first place. Depressed by his situation Makoto decides to kill himself.

Synopsis via AniList (English).