Shiomiso is a long-established inn in a small seaside town.

A quiet tourist spot surrounded by the sea and mountains, far from the city. In summer, it bustles with swimmers and tourists, but once summer ends, it returns to being a quiet town all at once.

The protagonist ends up working at Shiomiso as a short-term resort part-timer using their university summer vacation. The period is about a month and a half, until summer vacation ends.

There, they met the only son of Shiomiso—Minato Sena. And Minato's friend who lives nearby, Yamato Miura.

At first, they were just part-time coworkers. But as they worked together, played at the sea, walked through the town, and talked until late at night, the distance between the three of them gradually changed.