Chizu Hanashiro, Fumi Manjōme’s elder cousin, remains entwined in a complex familial and emotional history. In their youth, the two shared a clandestine sexual relationship that fundamentally shaped Fumi’s perception of intimacy, sexuality, and emotional fragility. Their connection fractured abruptly when Chizu’s family relocated, severing contact for years.

Chizu later reemerges into Fumi’s life through news of her arranged marriage to a stranger, a revelation that stirs profound turmoil in Fumi, reigniting confusion and unresolved attachment. The union marks an irrevocable turning point, as Chizu steps into a heteronormative future, aligning with societal expectations that starkly contrast the private world they once inhabited.

Chizu’s presence lingers as a formative force in Fumi’s emotional and romantic evolution, embodying themes of fractured bonds, silent yearning, and the enduring weight of unresolved history.