@Ironclad I heard having an old body is really straining. Even when youre erect, it doesnt go up, just straight. And you dont really generate as much semen as when you were young. So I dont know why NTRs and rape doujins have old bastards, cuz in reality, they cant last that long. And fat people...
The only anime character that I can imagine replacing him is Kazuma. Extremely prevy and a bit dense but also a bit of a coward. Maybe if he gets permission, then he'll do it. Well except this guy has a job