Things in the club have been going smoothly. Except that now finals are approaching. This also means it'll soon be time for the club's summer training camp, which sends everyone into a panic. If Nene doesn't get her grades up, she'll miss out on the trip, and while it's Professor Arisu to the rescue, can she actually succeed? Meanwhile, Rikka and Iko are both on a mission for new, eye-catching swimwear, and Shinobu has her hands full figuring out how to assign six people to three rooms…when one of them is a boy! Still, everyone is excited for the trip, and especially the summer fireworks. After all, there's nothing more romantic than fireworks…

Volume 5 of the Tune In to the Midnight Heart manga series by Masakuni Igarashi.