"Shinseki no Ko to Otomari Dakara"
The title translates roughly to "Because I'm Staying Over with My Relative's Child" or "My Relative's Kid is Staying Over."
- Shinseki (親戚) = Relative(s)
- no ko (の子) = Child (of that relative) → i.e., cousin / niece / nephew
- to (と) = and / with
- Otomari (お泊り) = Sleepover / staying over
- dakara (だから) = Therefore / because / so
- 1 = likely volume 1 or part 1
- new = newly released
- Otomari Dakara (お泊まりだから) as a short doujinshi?
- Or a chapter title from an anthology?
The Heroine (Saki):
Saki is the highlight of the series. In typical Uoyama fashion, the heroine is expressive and slightly eccentric. She isn't a cookie-cutter "tsundere" or "kuudere." She has a bubbly, sometimes chaotic energy that contrasts with Yoshida’s straight-man routine. She is comfortable in her skin but clearly harbors a specific reason for wanting to stay over (which drives the underlying plot beyond just slice-of-life fluff).