What are you talking about? Kaji fucked with lot of other guys before, yes, but those guys knew that was just sex. Kaji didn't show "fake love" to them. Kaji, an adult, fucked with other adult, just that, always consented.
When he realized that he liked Fukami, after some trouble and misunderstanding (BC ISSUES) he confessed, and was loyal to those feelings, hanging out, protecting, taking care of Fukami. So what "some consequences" do you talk about???
It's one thing to keep your sex life active with clear boundaries and another, very different, is to take advantage of someone who obviously likes you knowing that you can't return his feelings either for this or that reason, but to keep up with him with the "he can reject me if he wanted to" excuse, that's just something low
i mean, i don't dislike nor blame fukami, but please, this act would be really selfish even if kaji agrees
kaji doesnt deserve this