Malet is an undocumented Thai child living in Japan after being torn from their parents during an immigration raid roughly one year earlier. Approximately 11 years old, Malet has short black hair and an androgynous appearance that initially causes others to perceive them as male.

Following the raid, Malet took solitary refuge in the derelict Satomi coal mine factory. The location was chosen for its vantage point overlooking residential areas with distinctive triangular roofs; there, Malet watched, hoping their parents would return to search unless detained. Survival meant scavenging by stealing food and essentials from intruders entering the factory. This isolation fostered deep distrust towards adults, seen as deceptive despite surface kindness, and extended skepticism towards other children, including the group of teenagers who discover the hideout.

Malet's initial meeting with Mamoru Suzuhara and his friends is confrontational, marked by theft of their belongings. Fear of authorities and pervasive distrust fuel Malet's reluctance to accept help. However, upon learning of Malet's situation and pursuit by officials, the teenagers redirect their rebellion into a collective effort to protect the child. This exposes Malet to the group's protective strategies against encroaching adults.

Crucial information surfaces via Mamoru's online network. A contact named Tamasudare, linked to a Thai community near Nanyo, locates Malet's parents and arranges their reunion at the factory. During this emotional meeting, Malet kisses Mamoru's cheek in gratitude, an act revealing Malet is biologically female – a fact previously recognized by other teenagers but unknown to Mamoru. The reunion concludes with Malet leaving the factory with their parents.

Malet's presence pivots the narrative towards themes of immigration and protection. Their journey from isolation and distrust to reunion traces resilience, highlighting the vulnerabilities of undocumented families and the potential for unexpected solidarity.