Mira Munakata is a first-year student at Hakouh High School, raised from infancy by renowned Hollywood actor Kyōsuke Munakata, initially believed to be his biological father. Mira secretly engages in a romantic and sexual relationship with Kyōsuke, enduring internal conflict due to their perceived blood ties, while harboring a persistent dream of becoming Kyōsuke's bride.

His world fractures upon discovering adoption papers hinting Kyōsuke might not be his biological parent. Simultaneously, Mira grows suspicious of Kyōsuke's involvement with actress Mitsuki Utsunomiya, sparking intense jealousy. These dual revelations fuel his fear of abandonment.

Subsequent disclosures unravel Mira's origins: Mitsuki Utsunomiya is his biological mother and Kyōsuke's older sister. Kyōsuke assumed guardianship at fourteen to support Mitsuki's acting career, revealing himself as Mira's uncle. Despite this clarification, Mira's romantic devotion to Kyōsuke persists unshaken.

Mira navigates external romantic entanglements. Childhood friend Kazuki Hino nurses unrequited feelings for him, while Takayuki Utsunomiya—a third-year student and Mitsuki's stepson—aggressively pursues Mira, dubbing him "kitten" (子猫ちゃん, *Koneko-chan*). These pursuits compound the complexities in Mira's life.

Personality-wise, Mira displays social naivety and openness, occasionally relying on Kazuki's protection. Yet within his romantic relationship, he asserts himself firmly, resisting emotional domination. The truth of his parentage triggers profound distress, prompting temporary flight, but he reconciles with Kyōsuke after receiving reassurance of their enduring bond.

Physically, Mira is a teenage male with violet eyes and either black or purple hair, frequently illustrated wearing a traditional Japanese school uniform (*gakuran*).