Soundtrack #2 (Korean drama) - Season 1 - Episode 4

Soo-Ho and Hyun-Seo's relationship takes an unexpected turn as they grow closer through their music collaboration. Kei's feelings for Hyun-Seo deepen, leading to a love triangle. The ex-couple's past is further unraveled, shedding light on the reasons behind their breakup. Hyun-Seo's financial struggles and Soo-Ho's health issues continue to impact their lives. The episode ends on a cliffhanger, leaving viewers eager for more.