Munakata Mira is a 15-year-old high school freshman at Hakuou High School. He is secretly involved romantically and sexually with his father, Hollywood actor Kyousuke Munakata. Mira openly expressed his desire to become his father's bride since childhood; his close friends are privy to this dream but unaware the relationship has become physically intimate. Mira exhibits outward openness mixed with naivety, yet shows assertiveness within the relationship and during intimacy.

Mira's background drives the narrative when he discovers adoption papers, casting doubt on his biological link to Kyousuke. This coincides with his suspicion that Kyousuke is involved with actress Mitsuki Utsunomiya, triggering significant distress. Further revelations clarify that Mitsuki is both Kyousuke's sister and Mira's biological mother. Kyousuke, then aged 14, assumed guardianship of infant Mira to enable Mitsuki's acting career, raising him as his son. Despite learning Kyousuke is biologically his uncle, Mira's romantic feelings persist.

Romantic complications arise through Mira's interactions. His childhood friend, Kazuki Hino, harbors unrequited feelings. Takayuki Utsunomiya, Mitsuki's son and Mira's half-brother, pursues him romantically while attempting to arrange a marriage between Kyousuke and Mitsuki. The light novel series, extending beyond the OVA adaptation, depicts Mira developing relationships with others, including his biological father Ryousuke Munakata (Kyousuke's cousin), who becomes a love interest in the final volume. This broader narrative shows Mira navigating multiple romantic entanglements alongside his primary relationship with Kyousuke.

Mira possesses black hair and violet eyes. His character development involves reconciling his feelings amid evolving family revelations, ultimately reaffirming his commitment to the relationship with Kyousuke despite the biological clarification and external romantic pressures.