Mina, Rui, Hajime, and Tokio are four close young coworkers at a publishing company. Bright, optimistic, and sexually adventurous Mina is the complete opposite of serious, quiet, secretly lustful Rui, while feelings grow between different members of the group. A meeting about a magazine feature on friends with benefits suddenly changes everything. Does sex require love, or can desire stand alone? As their emotions swing back and forth, the choice they make could be brilliant—or a terrible mistake.