All the fans DONT say that its Shida Mirai, they say that shida
and yamada look very cute together, and i agree with that. But
Yamada never had a girlfriend, he said in one interview that he
wanna focus on his work, also i've heard that JE which Yamada works
for, is very strict and don't allow the juniors date until a
certain age. And to clear something else up, they didn't had sex.
Lol, Yamada didn't had even his first kiss. Since there is no proof
that prooves this, then i believe that Yamada doesn't have a
girlfriend in the mean time.