Bruh it literally is just what Seichii is telling himself to cope with their relationship and the nearing loss of his mother. Seichii’s forgiveness or guilt only ever manifests during dreams and stuff, this is just his thoughts personified.
I got a case of the 2nd male lead syndrome, cuz I want the Oji guy to at least get a shot, but at the same time I know that would make zero sense. 🤷🏾♀️