College sophomore Takamasa Natori reluctantly agrees to go on a double date with his friend Takeda, where he is introduced to Junpei Kisugi. Despite both being male, they have an instant connection and it feels like they have known each other for a long time. However, Natori is unsure about Kisugi's bisexuality. They still manage to maintain their friendship despite their differences. Natori's world changes when he meets Tohru, Kisugi's current and slightly possessive partner, and sparks fly between them.