Unsure if this gets addressed later or if there was a mistake in the translation, but isn't Poemu supposed to be 16 yrs old?
The Sis mentions Poe-san is 18, but a few chapters ago Lime stated his daughters are 16 and 15. This would make sense since Poemu is in her first year of highschool, unless there has been a time skip or this chapter just so happens to occur in a near future.