Kim Se-in

When a school girl disappears, suicide is suspected, and one of her classmates is suspected of having goaded her into it.

Jun-ho who avoids relationship commitments he runs into Eun-ji, who he had met through a dating application. Jun-ho suggests that they date without any responsibilities, and they begin an undefined relationship.

A poor couple is about to have a plausible date for their 3rd anniversary. However, their plans to go shopping and go to an amusement park start to deviate little by little.