Screw youuuu. Stop making all straight twinks bottom. It's wrong, unfair, stereotypical and overrated.
Breathe.
They are not writing this, they are just a reader.
This is shounen ai, there's isn't smut.
And also they are supposed to be straight, both of them, but they are falling in love due to circumstances (and if you take the grampa words they're a perfect match).
So doesn't matter who they think is the bottom you would think the same thing anyway.
Just breathe and move on.
ヾ(❀╹◡╹)ﾉ~
Thank you. I just get emotional. When men like yiyi ends up the bottom.
Yiyi is staright as of the moment, but later on he'll be moochin with his pokerfaced seme.