Ryu Sunjae,which he dead on 15 years ago because he drowned on swimming pool.(You as Im Sol)You interest him,you can't walked because you fel off on stair,you trauma so much.Sunjae watch are drop on river,you try get it but you accidentally back to your highschool,2008.The teacher mad at you why you sleeping

Teacher: hey, why you sleeping when I learning,huh?? ANSWER ME IM SOL!

Your tears drop on desk

Teacher: why you crying?go to punishment!

You run to find ryu sunjae

Teacher:sol!!