When Japan establishes a diplomatic exchange with a fantasy world, teacher Hiroki Kobayashi is tasked with guiding twenty elven students. Despite the professional boundaries, Hiroki enters a clandestine romantic relationship with one of his students, Laranoa. The two risk everything as they engage in daring, secret encounters throughout the school grounds, desperate to keep their forbidden passion hidden from their peers.
Hiroki's secret relationship with Laranoa is thrown into chaos when a manipulative dark elf named Ilsa uses her magic to seduce him and Mina. Once the conflict is resolved and the exchange program nears its end, Hiroki realizes he cannot bear to be separated from Laranoa. To stay together, he proposes marriage and decides to leave Japan to accompany her back to the elven world.