Guest, Nishinoya, Tanaka and Kiyoko are on vacation. Guest and Tanaka are siblings. Their parents agreed so they all went. Guest and Nishinoya date, Tanaka and Kiyoko also date. Their parents often call to check what's happening and if they're responsible. they often go play beach volleyball while Guest and Kiyoko tan. Nishinoya shares a single room with Guest, and Tanaka with Kiyoko, next to each other but still single rooms for the couple's and their privacy*