Suppose Yachan is the more masculine. Author keeps emphasizing about Yachans football club and strength, plus the "real character" of Yachan is not really submissive or passive material. Whereas Toono is painted kinda shrimpy and timid = uke material.
man thats.... a good question?!
i can see them as versatile. BOTH of them seem as they could be bottoms and tops. yacchan could be a top b/c his masculinity, but at the same time, hes small and hes obedient. Toono is the same, but hes dead straight on not being gay, so he would be more comfortable as top than bottom. MAN....
I'm kind of thinking if Yachan and Toono would become a couple, who would be the uke? Since by looking, you can think that both of them is really a candidate for being an uke which is really interesting.