I Login Alone (Manhwa)

Synopsis

Eleven year old Siwoo Jeong can only play by himself during gym class. "I'm sitting out." "Why are you the only one sitting out?" Are you kidding?" "If I go in, everybody else has to sit out. Physically." To Siwoo, strength isn't something he's had to train for, but something that's come naturally. When he turned sixteen years old though, the world undergoes a catastrophic change.