Yohan is the MC. And eh, Yohan's worries are understandable but not the way he acted, kinda disappointed that after so many years and being discharged from the military already he's still a crybaby and very insecure, and Moogyeong still struggles with expressing his affection with at least some words, but the whole thing ends in a wholesome note.
Yohan is still a crybaby and a bit of a weirdo, Moogyeong is still too cold (although way, WAY less than he used to be) and someone got what they deserved in one chapter (won't spoil it but I bet most people will love it).
Alright, so, to sum it all up... (these are spoilers for the whole thing btw)
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Moogyeong is obviously being flirted with by a hyung of his, but he doesn't realise it. Yohan, in his infinite wisdom, tries to explain his reasoning but does it poorly and immediately goes into paranoid mode, overwhelming his boyfriend for many chapters and it's all super dramatic for a while. Moogyeong says he'll go to see his mom to take a breather (not even to take time away or break up) and Yohan follows him. It's a little bit messy but they make up and they're all lovey dovey, although Yohan is content with saying "I love you" instead of "I like you" even if Moogyeong can't say it back (because he's bad with words, not because he doesn't love him). When they make up, Yohan says the weirdest shit ever while he's having his dick sucked, which is basically him asking his boyfriend's mum for forgiveness in the middle of the act (???????) as they're in the mum's house, but of course she's not there looking, he just feels guilty for doing that at her place. Yohan is a cute weirdo as always.
Moogyeong discovers he was being flirted with and he's dumbfounded. There's also a scene where a very known character is beaten up and man, he deserved it, finally xD
In the end, Yohan must be like 22 or 23 at this point and he's still a crybaby who is good at expressing his love but not talking about his insecurities, and Moogyeong is still a bit embarrassed about being more vocally affectionate even though they've been together for 3-4 years by now. There's a final scene where the mom implies that she knows and accepts their relationship (very, very subtly) and it's super cute and wholesome, a good way to end the side stories, although I wish we had more.
It's 8 chapters long and the first chapter really ends like that for some reason lol
I do think that Yohan was (and still is) super immature, and that he was way too overwhelming. FYL wasn't this dramatic before so I'm sure this stems from how dramatic "Form of Sympathy" was. Nodeok said she wanted to be "more realistic" but the characters being more mature would've been way more realistic imho.

read the raws...though i dont understand the language i think the ml's actions are understandable...imagine if your partner keeps getting phone calls and they always picked it up even during your quality time tgt plus they become super giddy or something like that...the uke is at fault