The Toilet no Hanako-san vs Kukkyou Taimashi series succeeds by tapping into a long-standing tradition of twisting classic Japanese folklore. While mainstream anime like Toilet-Bound Hanako-kun reinvent the Hanako-san mythos into a whimsical, shonen mystery, this adult OVA series leans directly into the dark, transgressive side of urban myths.
If you want to look up more details regarding the production crew or similar urban legend parodies, you can explore user lists and recommendations directly on the MyAnimeList Anime Profile Page .
Note: This post is written from the perspective of a retro anime/game blogger reviewing a specific fan-made or doujin crossover episode (Episode 4) pitting the classic urban legend ghost against the exorcist from the gag manga (The Humble Exorcist).