So then.. Are they going to have long distance realtionship? Bcause seme will move to osak...

I don't believe he's going he said he'd go once he gave up him (uke) and since they're feeling turned out mutual he not going to Tokyo

Actually this manga took place in Osaka. Kousaka wasn't even going to Tokyo. He is just planning to go to another school in Osaka. Which means they are not going to be in the same school, but still living near to each other.
(Well, still considered near compared to Tokyo haha)