Summer break is just around the corner, and it's time for Raizen High School's field trip to Arubi Island. Shido, however, has no time to relax! When his class reaches the destination, they immediately encounter twin spirits Kaguya and Yuzuru, who lock eyes with Shido and compete to be the first to seduce him! Can Shido make it out of this double-date alive and save the twins from their fate?!