With only one day left in the vacation at the villa, Hayakawa suggested to everyone that on the last night, they should go see the fireworks display on the neighboring island. Everyone changed into yukata for the fireworks display, but as soon as they were alone with Sanpeita, Izumi's memories of their childhood resurfaced, and she became embarrassed and ran away. MM in a yukata appears in front of Sanpeita, who is left behind...