As easy as it is to call Jun a dick, I'm enjoying this so far because it feels like a great exploration into the struggles of a young gay teenager. There's that expectation from many parents of wanting their child to get married and have children of their own, especially in an incredibly conservative and heteronormative society like in most Asian countries. That's one part of Jun's "desire". Alongside that is the comfort of knowing you have stability in such a society, rather than be in a relationship that's anything other than heterosexual and risk being ostracized by everyone you've ever known and not have the same societal benefits and rights as everyone else (marriage, healthcare, insurance, owning property, child adoption, many other legal procedures...)
In addition, I feel like Jun's desire also feels both muddled and "selfish" because he's possibly still exploring his identity. My interpretation of the "there's the 'like' that makes you hard and the 'like' where you're still soft" is the split model of romantic and sexual attraction, since they talked about it while Jun said "I like her but not love her." Of course I may be incorrect, feel free to let me know if I'm misinterpreting it.
I'm not going to say if I support a certain ship or not, but I am curious as to how this will proceed.