The Gachirezu Vivians, a pair of good friends, have entered a boring period. Recently, they have been seeing each other less and less, and it seems like they spend all day just passing by each other... Tsukishima especially seems to be worried about whether Shiina, who he hasn't been able to see recently, really likes him. So this time, Vivians decides to set up a "Private Surprise" to confirm Shiina Sora's love for Tsukishima! Is Shiina really having an affair while hiding in Tsukishima? And is there a ridiculous backstory to this project! ?