Maron is a Japanese female character with yellow or blonde hair and ochre eyes. She is the younger sister of Momoka, the school nurse. Maron harbors an unconfessed longtime crush on a specific boy at her school. Her unresolved longing leads her to masturbate within the school infirmary, accessible due to Momoka's position.

Momoka discovers Maron's solitary acts and her underlying desire. Unable to bear her sister's unfulfilled yearning, Momoka intervenes. She arranges a meeting between Maron and the boy, but only after personally vetting and approving him. This intervention leads directly to Maron's first sexual encounter. During this encounter, after the boy accidentally observes her masturbating, Maron removes his clothes and stimulates him with her hands and feet. This interaction culminates in him taking her virginity.

Following this initial encounter, Maron engages in further sexual activities with multiple partners. She, Momoka, and the boy visit a public bathhouse together, where they engage in a threesome. This event marks a progression in her sexual experiences beyond her first time. The character's narrative is confined to a single 2010 OVA release.