Fire Emblem: Three Houses - Romance the gatekeeper DLC (read right to left!)

Gatekeeper is best girl, don't @ me.

Here’s the anime scene this joke is referencing (warning turn down the volume the vid is really loud for some reason)

https://youtu.be/0UANiABx_w8

The part in question appears at the end at 3:50 but the whole thing is great.