How much is their age gap?
it hasn't been mentioned, but haijin is a minimum of 5 years older according to the storyline so far, and jk is finishing high-school soon so she's probably 17.
Although haijin could be in early 20s, I'm leaning more towards him being in his mid or late 20s.
I'm not sure if you read it so I'm going to put spoiler since I mention bit from some of the chapters.
MINOR SPOILERs^^
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I don't think its been clarified yet but I'm pretty sure the first time they met was when he was a highschooler and she was in elementary, remember when she painted a forest and talked about a memory?
That forest memory is actually quite the plot point, though since your just asking about age... I won't say anymore.
I'd say haijins atleast 5 years older, I'd take a guess of about 8(?) years older since he is also older than mikotos brothers.
Mikoto is also in her last year of high-school? I believe she is 17 as of current.
There's actually quite a bit of spoilers you can find digging around the comments.
Bruh I hope garam doesn’t go back to that girl
Not indecisive, but very decisive. That’s the character trait Garam described for her. Despite not wanting to end things, she did because she believe that was best. She felt like she was taking something away from him, which is why she ended things. Most likely because she knew that if she told him why, he’d say he was fine with it even if he wasn’t. She made a decision she felt was selfless so he could get what he ultimately wanted, but she didn’t realize that he loves her more than he wants a marriage and children.
They seriously got to this point because they didn’t think to discuss it at all; they both avoided the issue. Him by shutting up about marriage and kids and her by calling it quits one-sidedly.
I hope they work this out.
Is chisoo a very nice guy?