Mori no Asagao - Shinjin Keimukan to Aru Shikeishuu no Monogatari - Vol. 1 Ch. 6 - A Letter from the Victim’s Family. (Pt 1)

[MangaDex]

 

[RiverChamploo]

i don't think the inmates goal was to ever receive a letter back, he just wanted to genuinely express his regret. but nao's words changed his perspective cuz it made him feel like he had no purpose outside of his redemption. maybe im not so sure