(W) Koushi Tachibana (A) Tsunako Shidou Itsuka has a problem. The world has been racked by massive quakes of an unknown source for years now, though life goes on. Then one day, Shidou's calm life ends forever when in the middle of a quake in his city, he meets a girl who's apparently a spirit-and the cause of all the destruction! When a team arrives to eliminate the threat, Shidou becomes embroiled in a war to protect these spirits-by making them fall in love with him?!

(W) Koushi Tachibana (A) Tsunako Shido was going to save Kurumi and Mana. He had to. And yet in this critical moment, he finds himself immobilized, unable to follow through on his promise. If Kotori Itsuka hadn't shown up at the last second, everything would have fallen to ruin...but Shido still feels like his world has come crashing down as he finds out his little sister is a Spirit, too...

(W) Koushi Tachibana (A) Tsunako 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?!