It starts in the current moment with the characters in college, then they are in their uniforms in a brief flashback with the box saying something like "we started dating in our second year of high school", then it cuts back to the current moment again where they clearly aren't in uniforms.
And after the flashback the mc clearly says that it has been two years since the original confession. And the flashback even has the standard black flashback background. I'm not sure you should be getting this bothered by manga that you apparently just skimmed.
You're sure damn right I just skimmed, I mean looking at how "iNNoCeNt" The uke acts, I knew this was gonna be not so bad and not so good either, I wasn't really bothered by the age much, it was the appearance that made me drop it, he looks like a kid, acts like a kid, seems to barely know anything about sex, just like a kid. So, that's why I got confused about the age and skimmed through this manga.
I don't mind you not reading it. There are tons of things I don't read based on tags alone. For example I can't read teacher × student stories without feeling icky. But I also don't leave comments on them based on a summary glance.
I'm sorry, I can't read a yaoi when the uke looks like a fucking middle schooled kid, and how old are they either way?? Are they in college or something? I forgot what chapter it was, but werent they drinking beer? I thought they were highschoolers because of their uniform but it seems like I was wrong?? And the uke also acts like a kid, "WhY DidnT u tElL mE u uSe yOuR bUtT FoR SeX." Like da fauq? Shouldn't everyone know that? Straight or not?