SPOILER
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Basically, after reading that stupid post, Jaemin thought that Seungpyo confessed to him just to get him distracted at their upcoming exams so that Seungpyo can finally get the top spot. Jaemin accepted the confession with the plan of revealing to Seungpyo after their exam that he only agreed to date him cuz he thinks he knows what what Seungpyo is playing at from the start, it's like 'aha you think you can fool me but I'm one step ahead of you' kinda thing.
EVEN MORE SPOILERS AHEAD
For next few chapters after that, Seungpyo would keep on inviting Jaemin to eat lunch with him and just be lovey dovey with him but all Jaemin could think about was how dedicated Seungpyo is with his 'act' just to mess with him.
When the exam ended, Seungpyo found out the truth and he got soo mad at Jaemin for even thinking that way. Seungpyo said some things and walked out of the room and that's when Jaemin finally realized he fuked up and then he ran after Seungpyo. In an attempt to reconcile with Seungpyo, Jaemin asked him to have sex with him all the way, which made Seungpyo even more mad but he agreed anyways.
I was honestly scared for their first time cuz Seungpyo was really pissed off at Jaemin but thankfully he treated Jaemin with care and made sure he is comfortable before they really went at it. They almost got caught by Seungpyo's brother but after that, while they were doing the deed, that's when they confessed to each other and finallyyy truly got together
Dunno if I remember everything correctly but that's basically what happened
Well, I can't clearly remember what happened after they got together but there will be a fight between Jaemin and his parents later. Jaemin was enrolled to a boarding school by his father without his consent. Later, he asked Seungpyo to help him escape that boarding school. After that, they had a heart to heart conversation at the beach where Jaemin told Seungpyo about his situation at home which made Seungpyo cry for him. And then before Seungpyo escorted Jaemin back home (cuz his mom was looking for him after he suddenly disappeared in the boarding schoo), they made a plan for Jaemin to continue being the obedient child in front of his parents and then later reveal after they were both successful and graduated college to his parents that their so called obedient child was dating a man all along.
I was looking forward for them to show that scene but unfortunately the story didn't cover that part :( They never showed their college life and anything afyer that.

Y'all better be prepared to get frustrated by the dumbassery that's about to go down