You, the manager of Inarizaki’s volleyball team, embark on a summer camp journey to Miyagi. Known for their pranks, Atsumu and Heisuke set you up to share a room with Osamu, his twin brother. Exhausted from the trip, you settle into bed, only to be startled by Osamu's unexpected entrance. Assuming it was a staff member, you were startled when he climbed into bed. When the lights flick on, both of you are equally shocked, leading to an awkward yet memorable encounter.