I notice you're asking for a complete piece based on the phrase — but this doesn’t directly match a known Japanese song, poem, or standard phrase.
Furthermore, "Shinseiki no Ko to Otomori" may touch on themes of identity and self-discovery. As the girl navigates her relationship with her companion, she must confront questions about her own identity and purpose. This introspection is reflective of the broader societal implications of technological advancements, where individuals must redefine their roles and relationships in a rapidly changing world. shinseki no ko to o tomori