Four Hands, Two Sonatas

Kang Pi-o is known around school as an unrivaled talent, until he meets the mysterious Choi Jeong-yo and realizes he may have finally met his match.

With Jeong-yo now his classmate, a bitter Pi-o keeps his distance; but when the two are tasked with a joint performance, Pi-o finds himself warming up.

When crisis strikes right before the joint stage, Pi-o improvises a fix, only to wonder if it was a mistake when Jeong-yo's skills outshine his own.

With Pi-o determined to reclaim his love for music, Jeong-yo shows Pi-o how to have fun on the piano; Jeong-yo's family troubles catch up to him.

Intent on proving himself, Pi-o joins the Prague Harmonie International Competition and asks Jeong-yo to join too; Pi-o's obsessive practice takes a toll.

Pi-o gets successful and world-renowned but stays miserable; Hong Jae-in tries to let Pi-o know how she feels; Pi-o hunts down news of Jeong-yo.