Hirugao～Love Affairs in the Afternoon～

Sawa lives an ordinary life with her husband. One day, she unexpectedly encounters a habitual cheater who tries to convince her to have an affair.

Sawa's mother-in-law suspects her of being unfaithful. While Sawa unexpectedly runs into Kitano, Rikako secretly visits Kato at his art studio.

A frustrated Sawa tells Rikako she is glad Kitano rejected her before it turned into a full-on affair and says she doesn't intend to see him again.

Rikako offends Kato by offering him a transactional relationship. Sawa grows concerned for Rikako after seeing her online dating profile.

Sawa and Kitano get intimate in a hotel room. Later, when Sawa receives a call from Takigawa, she realizes Rikako is in danger and rushes to her aid.

Sawa and Kitano go to the zoo for a date. Meanwhile, Takigawa follows Rikako to the beach and takes pictures of her and Kato to prove her adultery.

Rikako tells Sawa to hide her tears or risk suspicion. Later, as Rikako and her husband argue, she admits she has had affairs with several men.

Noriko asks Sawa how she knows Kitano's surname if they'd never met before. Later, Takigawa finds Sawa at work and gives her a message for Rikako.

The police talk to Sawa, Kitano and Noriko after the scuffle in the library. Rikako gets a job at a hostess bar to support herself and Kato.

Sawa and Kitano run away to a lakeside vacation home and enjoy a brief isolated fantasy. Meanwhile, Hasegawa visits Shunsuke's home to comfort him.