Responses
Someone above said is true, winter season is really the drastic opposite vibe of summertime, well maybe because the tittle itself summarise about the season vibe and yeehyeon's calm demeanor made me guess it since creator's note that hinted in summertime what his story is about before i read the novel

Haaaaaaaaa. What can I say? The novel was fucking tiring and messy. MC is the dumbest uke ever. ML is a psychopath (also dumb).
MC and ML used to be bestfriends in high school. Then after an accident, they never spoke again and met 9 years later. This time, uke needed money for his family and seme needed someone to use against his brother.
Ok so the story starts with ML saying that he'll clear the uke's dad debt if he agrees to seduce his bro (trash too) and gives a password that his bro has. He says that his bro's type is the MC that's why he gave him this task. MC agrees and from there he tries and he got close and then he succeeds. All the while ML accuses MC of sleeping with his bro and other people (MC did not), calls him slurs, slut-shames him. He's always mad when he says these and he's just so crazy jealous he doesn't even know it. He also always says he will never sleep with MC bla bla, that he's not into guys bla bla. But then he asks MC to kiss him lol.
Then, ML's brother gets ahold of the video of the "accident" from 9 years ago. He threatens MC to meet him 5 times and he will delete it. MC was like "I need to tell ML about this" and THEN BACKS OUT. He agrees to meet ML bro 5 times. ML kinda asks him from time to time what's wrong but he won't fucking say anything. He had many chances! Instead they had s*x and then he met ML bro. FUCK. He's forced to give ML bro bj every time he requests it. On the 2nd time, he ditched ML on his birthday and on the fourth time, ML catches him in the act, in MC's apartment. He tries to explain but ofc ML won't listen. He tells ML about a video but he won't tell what it's about. So ML thinks it's MC's p*rn vid. He then gets so livid with jealousy that he r*pes him. On the fifth meeting, MC was brought in, drugged, and they were putting blindfold on him when ML arrived. MC thought he will be saved but sike! ML gives the blindfold to the guy tying the MC and then leaves. But sike again! When MC was about to be g*ngr*ped in front of a live audience ML saves him! And what does he say to ML?! "I'd rather go to your bro than you!!!" WHAAAAAT?????? Then ML confronts and confines him. Turns out the ML knew that his bro had been doing this live drugged gangr*pe way, way before and he knew that MC might caught up in this the moment he ordered him to seduce his bro (he didn't know the bj will happen though). But still ordered him to do so. We hit the flashback.
MC grew up as a pastor's son. He discovered he was gay and somehow a bully (male) from highschool who I'm pretty sure had a crush on MC discovers it. MC and ML are already friends at this point and ML is a real hater against same-sex relationships. He's open about it and really shows his hatred, calling gay couples slurs and cursing at them. The bully guy somehow discovers that MC is gay and uses it as a threat so he can sleep with MC and he will tell everyone that he is gay. MC is scared and was ready to go along but ML always saved him and stuff. He pushes ML away but ML comes running to him whenever he's in trouble and then hen he pushed ML away again. They kinda stopped talking for a while.
Then one day MC told the bully that he will jump off a building because he can't take the bullying anymore. Bully tried to stop him then we discover what the "accident" from 9 years ago was was. The bully filmed the ML killing someone. He then threatens MC to sleep with him in exchange of deleting the video. But wait, on that day, ML is on a funeral and wants MC to stay with him. This dumbass MC instead of telling ML what happened, decides to go with the demands of his bully. WTF. Guess what happens, bully messages ML and ML catches MC on the act (no penetration). So he was libke, I told you I needed you but you prioritized getting frisky with this guy? Then he beats the shit out of the bully, calls MC some slurs, and gets arrested. They never saw each other again after that. MC gets kicked out and works part time, then suddenly his dad got cancer and they're in debt.
We get back to the present where ML confined MC and ML finally confesses. Then theres' a last kidnapping where ML where he saves MC and discovers the truth about the video. Then, instead of talking like normal, functioning human beings, he flees for the MC's safety lol. I can't. After that, MC attends his sister's wedding. What happens? Dad kicks him out again cuz he's gae. ML then appears waiting for him and they have s*x at the venue's hotel and then they're together.
It's 3 am now and I will sleep.
edit: You know what the stupidest thing is? ML bro does not have the video. The MC already got rid of it 9 years ago but he wasn't sure if what he deleted was the original. Turns out it was.He didn't bother checking if ML bro really has it. Also even if there was a video, the quality as so blurry nobody would guess it was the ML killing someone.