Police detective Sakamaki's interest in the Hayasaka Family has yet to subside when he comes across a few tweets related to the Fortune God, leading him directly to Ruka's mother. Meanwhile, Ruka finds herself in her last summer in middle school and comes up with a plan to fulfill her feelings: She decides to go on a trip to Osaka with her crush Oikawa. The story is speeding up, but with love and desire burning in the air, this chaotic summer has just begun.