Some community discussions mention Studio Drive , though for series of this nature, production details are often less formal than mainstream anime. Translation Breakdown Japanese Phrase English Meaning 親戚の子 Shinseki no ko Relative's child お泊まり staying overnight / sleepover because / since
: The story often explores the awkward yet intimate dynamics that develop when two people are thrust into a domestic living arrangement. shinseki no ko to o tomari da kara eng
If your original search intended "eng" as short for "engagement" (婚約 – konyaku), then the phrase means: "Because I am staying over with a relative’s child, [this affects my] engagement." Some community discussions mention Studio Drive , though