This story is painfully sad yet beautiful yall... The MC Jisoo became a high school dropout because of bullying and betrayal by his trusted friend Hyunwoo, who's a bit messed up in the head because he has this "affluent kid" proclivity to help troubled people aka projecting a false image of a Samaritan who doesn't understand shits. He messed up Jisoo real badly thus resulting in the guy being suicidal and closed off. The high school-bullying trope is in almost every manhwa yes but this is one that tackles the consequential mental damage deeply.
Give it a go to see how it's done.