Yamato told yuiji that he is uke.
Yamato said people will only be interested in him as neko but yuiji started remembering reading in the internet about the two words thats why Yuiji ask Yamato what's the other name for the opposite and Yamato said is tachi. Yuiji just went back to answer Yamato about neko and Yuiji answered said so you are him.
No he didn't he asked what's the opposite of neko, and yamato replied tachi, then yuiji asked so you're "that" which implies to tachi, if you look and reread closely Yuiji also asked
"Girls are no good?" Which also implies him being top as well.
And he also stated himself he's only interested being a tachi and wants to embrace his beloved one (a guy).
I don't ask so much......I JUST WANT THEM TO BE TOGETHER AT THE END (and that's not sure) AND MAYBE KISS (and that even less sure) AND IF THE AUTHOR FEELS LIKE IT, HAVE SEX I WOULD TOTALLY BE FINE WITH IT (but that even less sure, 'cos that's not the type of manga.....and they didn't even begin to notice their feelings for each others. if feelings there are.) ╥﹏╥
Yamato will be seme and yuiji is uke thats what i live for this manga