
I didn’t understand the endsomeone please explain:’)

Do you mean the "creating a new 1 to 10 list"? We can say it's a BDSM culture thing. In bdsm everything should be consensual so Kurose asked Shirotani to write down basically his kink list of what he would want to try, like acting out a scene, choking, St Andrew's cross type of thing whatever, so that they can discuss it. Kurose is really sadistic and a dom so

Bro I just think he wanted to try out more expose therapy stuff with Shirotani.

I don't think the list was a Bdsm thing. I think it was just simply for Shirotani to write down his true desires which could be simple tasks to help conquere his OCD, something kinky, or something like "Kurose I want you to spend the rest of your life with me" (which is something that would sort of change Kurose's life - a thing Shirotani was afraid of doing.)
Lmao I bought the book a while ago, it’s good