No they don’t. And in the flashbacks he was wearing the school uniform and he was hiding from teachers that he smokes. you wouldn’t care about that as a visitor. It’s the same school because the next day when uke’s friend tell him how the ambulance came to the school and mentioned that he know who (seme) did it to his brother. But the brother returned to his uni after hospital so i think that was a mistake but since i read everything in two days, it was really obvious to me. not that it’s a problem
I think the brothers are only 2-3 years apart and the staircase incident took place at the end of the older brothers 3rd high school year.
Around the first few chapters they go on a break and that's when Byeol and Woon get to sit in the same class. This is the start of their 2nd year and this is likely when the brother graduated. But since the older brother has early admittance to college I don't think his graduation was celebrated much (probably an oversight of the story since it wasn't too relevant at the time.)
When Hyesung goes drinking and Taeyang walks him home, I think that was for a freshman orientation party. The raws have him introducing himself to people
Ok I have question. What was his brother doing at the roof of their high school? Isn’t he a college student? Why would a university student smoke in a high school rooftop? I loved the story, but just that part didn’t make any sense