Megumi Soutome is a contract employee in the editorial department at a publishing company. She is invited by her colleagues to join them for a drink get-together, but Megumi Soutome declines their offer. She leaves quickly after work. The reason why she is in such a rush, is so she can have a "solo katasu." She enjoys solo activities like eating alone at restaurants, having her own party, and staying at love motels.
It's a sad and humorous story about a man encounter with various women and slowly regaining his smile. The woman whom he loved most in his life, Asuka, made a living by selling saliva for perverts. The story will focus on his six years with Asuka.