both of them are students at Yusung Tech High, in 11th grade, a school that isn't like regular ones, kids fighting,smoking etc while teachers can't do anything.

Phi Han Ul (or Han Wool)–who everyone either respects or fears– is the son of Pi Yeonbaek, he made the ranking app– the students fight each other and that's how their rank gets higher or lower. Phi Han Ul is no. 1 in both fighting and grades. The YB family is a gang lead by his dad. If you mess with him, you might even die.. Literally. A teacher who wanted to hold a disciplinary committee meeting (idk if that's what it's called) for him, got killed.. And ofc it was ordered by him.

Ma Minhwan is the 2nd on the ranking app. He usually has a gun with him, not with real bullets tho– with iron balls. He's Phi Han Ul's right hand man and best friend. He's the leader of the 'No reason' group.