hmm you do have a point. While Innyuyasha may only be rated TV-14, itch does not provide the same level of depth that most other viewing platforms do. Generally, E, T, and M. By itch's standard, it's either porn or its sfw, hence the name, this is not the adult account this is the not-adult account.
of course, after getting away with watching endless amounts of pg13 movies on the tv's at our host's place of work, the definition is skewed. We're not going to hold people's hands, it's a comedy, and if it's not someone's flavor of weird furry-anime-homestucky humor, then that's fine. but no need to ruin the surprise for anyone who does want to play it. Should be pretty clear from the word 'go' with subtext that this story is just somewhere below highschool dxd or gurren lagann(update: how the heck is gurren lagann rated PG? that should be pg13).
But we will acquiesce and add an extra warning just in case folks are not familiar with anime