Mayonaka Heart Tune 2nd Season is the second TV season of the comedy romance that began with Tune In to the Midnight Heart. In the earlier entry, Arisu Yamabuki is a second-year high-schooler determined to track down Apollo, a radio host whose voice comforted him on lonely nights until she abruptly went off the air years ago. He has something he wants to say to her, yet he knows neither her face nor her real name. His leads bring him to his school's broadcasting club, where he meets four girls who each hope to build a career around their voices.