Nino Arisugawa, a girl who loves to sing, experiences her first heart-wrenching goodbye when her beloved childhood friend, Momo, moves away. And after Nino befriends Yuzu, a music composer, she experiences another sad parting! Luckily, she reunites with Yuzu in high school, but Nino still yearns to see Momo again. In a bid to get Momo's attention somehow, Nino strives to improve her singing skills. She soon lands an audition that's being held by a "Momo Kiryu"—could he be her Momo?!