Natsuyasumi 3

Yuu finally visits Natsuki's hotel room, where a steamy bath together leads the two boys to their most intimate day yet. But their blissful summer fling takes a bittersweet turn when Natsuki abruptly checks out and vanishes without a proper goodbye.

Only afterward does Yuu learn the truth, Natsuki is secretly a rising idol, and their fleeting "summer period" comes to an end as he steps back into the spotlight.