
The shaving part comes AFTER that. They'll start training again as they always did. Shaving uke's pubes is a new start of his training.

Well who knows only the Mangaka can tell the thruth ( ̄∇ ̄") Speaking of flashback what's that book the delinquent was holding and got annoyed? What's the meaning of that then?
http://www.mangago.zone/read-manga/seishun_kinema/uu/seishun_kinema-chapter-4/25/

*I mean what's the point of showing that part of the flashback?

I see. That can make more sense. I wish the Mangaka make an extra. Like His POV. It will be more clearer then

LOL yeah that sounds interesting XD
Lol don't let those end notes fool you: they didn't shave Todo's pubes. You can clearly see he still has them in one of the last panels. Shishou was shaving himself because he wanted to manipulate Todo into trusting him over their "similar insecurities." He planned the entire thing, and I'm pretty sure he knew that Todo would forgive him for raping him as well. At that point Todo was too reliant on him, and it would only be a matter of time until he crawled back. Hell, if Shishou himself hadn't said it was rape, I doubt Todo would even see it as such. What kind of guy says, "What I did was criminal and unforgivable," but then be okay with having sex right away? He wasn't remorseful at all. Shishou has been kind of dark since the beginning so I'm not sure why anyone is shocked by his actions?