Comment by Sethismyidol on Form of Sympathy - Chapter 5

So here's the quick Summary.. The Geo teacher Mr. Lee (MC) is depressed so he always gets drunk.. and whenever Yuri (ML) put ciggerate close to him he remembered his crush who used to smoke the same cigarette, that's Yuri's adopted sister husband.. and Yuri got one sided love at his adopted sister.. cause there is a reason..
So..Mr. Lee is Actually very good teacher but now he's struggling with students and stuff, he's having self doubt but actually he care for his students but there are some teachers who ignored students struggle but our Mr. Lee can't, so they kinda have beef with Mr.Lee and that Jiheon guy is student who's transferring schools and that..teacher told Me.Lee about Jiheon because Mr.Lee is the only teacher who actually care for students even tho that Jiheon is not his own student he's from another classroom.. rest you'll gonna know in upcoming chapters 

And If you guy's are confused between Mr. Lee and Yohan.. so Mr.lee got mole and Yuhan don't and they have different hairstyle also.. Yuhan is Yuri bestfriend who's also gay and dating Mungkyuk(Moomoo) who's studying same major as Yuri the black hair guy with small eye ba***.. Yuri has 2 sister.. one is very rude and one is adopted I think that's all I remember