>>2529145So I wanted to provide a source and totally amateur translation on this page because I like it. I don't know Japanese well and was assisted by auto-translation, but hopefully this is decent enough.
It's from a Namco X Capcom doujin called Cross Variable. Other than this page and a quick follow up there aren't any other toilet scenes, but it does feature Xiaomu with a penis, Morrigan, and some well-drawn Shion nudity, so it's worth checking out if you're into that. Link:
https://e-hentai.org/g/528353/71ce50e6f9/ 