Tune In to the Midnight Heart (Japanese: 真夜中ハートチューン, Hepburn: Mayonaka Hāto Chūn) is a Japanese manga series written and illustrated by Masakuni Igarashi. It began serialization in Kodansha's Weekly Shōnen Magazine in September 2023, and has been compiled into eleven tankōbon volumes as of December 2025. The series is simultaneously serialized in English on Kodansha's K Manga digital service. This series follows a young Japanese boy searching for the identity of "Apollo", a girl who used to livestream and gave him solace. After narrowing it down to a specific high school, he transfers there but faces the challenge of identifying Apollo among the broadcasting club's four girls, who have their own dreams and a desire for his financial support. An anime television series adaptation produced by Gekkou premiered in January 2026.