From a chapters ago I feel like Yuki knows that Ryohei is cheating or something like that. And notice how Ryohei says "I haven't been able to let some steam SINCE I'M HERE" or something between the lines, idk but smells fishy
Right I thought it was a odd way to say that as well also made me think hes cheating AlicesWh0reH0use
And in chapter 9, Ryohei contacts Yuki asking if he stills with MC (I don't remember his name xd) and says that he can't get a hold of him. I feel like the two of them have an agreement.
From a chapters ago I feel like Yuki knows that Ryohei is cheating or something like that. And notice how Ryohei says "I haven't been able to let some steam SINCE I'M HERE" or something between the lines, idk but smells fishy