"It's the sea, the sea! The sea of Okinawa!" The place where Marika and her friends visited for their school trip is Okinawa, where they can get a taste of summer ahead of time! Marika and Aya, who are about to celebrate their one-year anniversary. With an itinerary full of aquariums, beaches, and events, everyone's excitement is at an all-time high──but. "What is this... a bright, fun, lovey-dovey school trip..." "Making memories for our one-year anniversary. I packed in all the things Marika loves." As Aya's unsettling surprise looms, Hina joins the group, and the unforgettable 3-night, 4-day school trip begins…! The super popular girls' love comedy, volume 7!!