I absolutely loved it. I was into it from the beggining to the end. The length was perfect.
One of the rare kdramas with not a predominant romantic relationship and I absolutely loved it.
I enjoyed it from the very beggining.

If I had to point out little things I disliked,it would be (btw I'm being tacky because you can really overlook that):

- It was interesting to have gay characters but I felt like the couple that was revealed was as waited as irrelevant. To be clearer I already felt
at a certain point that it was Sejin that was dating him (not gonna spoil the character's name) from the little flashbacks yet when it was revealed it was already too obvious to make me be like 'Oh. Such a plot twist!' Also in when the latests scenes of their couple was showed as a flashback, I felt like there was no chemistry between them, as if they were putting on some act ? (you know, as in some BLs...). Yet they were cute together (tbh I would have preferred if it was been revealed jae bum was actually really dating Wonseok because in their photos they really had some chemistry).

- We never got an explanation on how the four boys knew each others and how things got ruined since lately they were almost all having beefs with each others.
--> a bully to the two others, who turns out to be also a gaslighter and really manipulative afterwards to the third and last one..

- The way writers erased Jae Bum and ML's friendship as soon as they introduced it, was disappointing because I liked their genuine and cute interactions and after it just maked no sense how they went from super friendly to just acquaintances who talk only when chan mi and the investigation are getting involved smh...

- Then the end. I felt last ep was too rushed. Evil character (forgot his name) absolutely didn't receive what he deserved when he litteraly destroyed every single character's life. On the other side as soon as Jae Bum (defo my fav and even always loved this actor sm) stepped in that damn car, we never knew what happened to him like writers please?- we wanted to know how judicial stuffs went for him eventho it was clear he was in some serious sh*t with evil character dead now. Btw Oh Sung (I now recall "Evil character"'s name lmao) is defo not straight. I feel like writers pulled out this plotwist with this "I love my biggest enemy who is also my relative" trope to avoid having another queer character in the series. Why ? Because of his reactions (mainly jealousy) when Jae Bum was with other ppl (yet the same Oh Sung would deliberately abandons him for his friends as soon as he could) especially ML, Soo Heon. A precise example would be when he said "it was Wonseok (who at that moment of the series was allegedly Jae Bum's bf if we rely on what Oh Sung was saying) and now it's Soo Heon" as he was looking at the two of them from a classroom above with something in his voice that hinted he could be attracted to Jae Bum. Also when a moment in the series came that ML and FL went to Oh Sung's house to check out what he was hiding and saw several pictures of him and other 3 boys (Wonseok , Sejin and Jae Bum), I REALLY felt like it was some hints that he really liked Jae Bum (in a not sane way tho but you see..)

I loved all the characters and appreciated how they all had a background. A quick shoutout to Sooheon boi who caught a cancer only for plot's sake cuz wth ?. He successfully lived after all that eventho his head was getting banged throughout the whole show, he was fainting often and he was more likely to die but I assume it was for the show's sake-