Ai and Chiharu are classmates and best friends at the same school. However, Ai harbors deep romantic feelings for Chiharu. Unable to suppress her emotions any longer, Ai confesses her love, leaving Chiharu visibly flustered and unsure how to respond. The confession creates an awkward tension between them. A week later, Ai calls out to Chiharu, saying, "Let's just forget what I said..." But Chiharu surprises her with an unexpected reply: "What if we try going out...?" Agreeing to the proposal, the two begin secretly nurturing their relationship, careful not to let their classmates find out. Yet, something begins to trouble Ai...