Sad Song is the seventh Korean language extended play (EP) by South Korean boy band P1Harmony. It was released on September 20, 2024, by FNC Entertainment. The album consists of seven tracks, including the title track, "Sad Song".
The EP, comes about seven months after their first full-length album Killin' It. It has six tracks including the Lain-rhythm-themed title track. The album explores feelings of loneliness and emptiness, as well as the process of overcoming such emotions through the concept of superheroes.
Sad Song sold 179,487 copies in South Korea. It peaked at number two on the Circle Album Chart, and number 16 in Billboard 200.