
.....I honestly feel frustrated but probably not for the reason you're thinking(Mr. In). I'm frustrated because the moment I try to hate someone, the story starts giving me reasons NOT to. It halts my anger so I can't even pour it out on any of the characters like what the fuck. "This character is so insufferab-- oh it's solved ok" Show me who's behind sihyeon's suffering so I can be angry at them!! I DON'T EVEN CARE IF BASICALLY EVERYONES IN LOVE WITH SIHYEON/HAJIN AND THEY'RE ALL DESERVING OF HIM JUST LET ME BE A HATER I CAN'T DO THIS ANYMORE

this is so childish its actually funny lmfao.
Do I cringe at whitejack? yes. Is this a cliché story? yes. Am I still gonna read this cliché shit? also yes because I'm a basic bitch who loves cliché(and also because it's good enough for passing time)

It's a bit vague atm, since the comic itself hasn't mentioned any ages or what he's studying for, so we only know that he's studying at some academy (no mention of whether it's HS or cram school), hence the confusion.
Tho, I have no idea if Koreans study for their CSAT during HS, or after just graduating. Bc where I live, we do our college entrance exams during HS.

I've seen several manhwas with characters that have graduated high school, but are studying for CSAT for a variety of reasons. The most common reason they usually give is that they didn't do well enough to get into the university they wanted. I've also seen academy used as shorthand for cram school like a learning academy.
In addition, I looked up the webnovel summary. The MC is described as a third time repeater meaning he's taking the exam for the third time

am i crazy or is this the same author as the one who made a lot of todobaku djs..?

I have 12 years of experience as a fujoshi and when it comes to yaoi i suddenly have phd and like acting like professor when my friends give me describe of a bl or what they remember abot that bl but doesnt know the name they come to me and im finding those things pretty easily. Porn addiction is weird i shouldnt be proud but i kinda feel proud. I wish i had this energy for my work and studies TAT
lord help me im still waiting on this