Basically a classic/memetic prank of greeting someone with "okaerinko" (instead of just "okaeri"), making them reflexively answer "tadaimanko" before realizing that "manko" is, uh, a less than polite word for the female genitalia. Sanae of course seems pretty into it.
As you can probably guess, that's pretty hard to translate for several reasons. I can't immediately think of an equivalent pun in English. Suggestions are welcome, or we can all just make do with this explanation here.
As you can probably guess, that's pretty hard to translate for several reasons. I can't immediately think of an equivalent pun in English. Suggestions are welcome, or we can all just make do with this explanation here.