High schooler Akira was raised as the heir of Kikunoyu, a sento bathhouse run by his grandfather and mother. He always had dreams of becoming a hero. But he quit baseball, which he'd been playing since he was young, and spent his days going to karaoke after school with his childhood friend Kacchan. One day, Kacchan receives an email from the idol talent agency sMiLea Production on a recommendation from the legendary idol Anela. Although Akira has no relation to it, it seems that he might be involved...

Akira's group is relieved to make it through the commercial shoot without any problems when Lin immediately informs them that their debut has been set. At the same time the three are busy with shoots and interviews, Anela features in an up-close and personal program focusing from now up until their retirement. Various thoughts and memories come back to the surface, including the day Lin and Maoto decided to retire and the establishment of sMiLea Production.