The narrative centers on the daily interactions between the protagonist and their relative, who has come to stay over. While initially awkward or purely familial, the "stay-over" (otomari) arrangement leads to a growing intimacy. Living Together:
Discussions regarding the first entry (be it the first season of the anime or the first volume/arc of the source material) often highlight its strengths compared to subsequent developments: Pacing and Originality: shinseki no ko to otomari dakara 1 better
It seems you might be referencing a specific manga, light novel, web novel, or fan work titled something like “My Relative’s Child and Sleepover, So #1 Better” — but no known mainstream series matches this exactly. Title: The Cage of Eternal Slumber
But since you asked for a using that exact keyword, I will assume you want an SEO-optimized, informative article around the imagined theme: Use sensory specifics: temperature, sounds, smells to ground