This is the visual diary of Kiitarou's experience with youkai. He's a boy with a very strong spirit sense, but when he entered a forbidden storehouse, he was kicked out of his home. He soon found a new place to live, where he met a zashiki warashi (house spirit) named Suzu. He and Suzu soon began to attract all kinds of spirit creatures, starting with a nurikabe (appears as a wall that impedes travelers) and mokumokuren (appears as eyes in a torn paper wall). What kind of folkloric creature will he meet next? (Source: MangaHelpers)

An unaired episode 13 of Kiitarou Shounen no Youkai Enikki included on the DVD/BD release. Kiitarou runs into typical ecchi manga tropes due to Lucky Eros albeit he doesn't feel lucky and tries to avoid everything happening between him and the female youkai.

Enma is a character created by the genius manga artist Go Nagai. Now, the popular character makes his appearance in an alluring Japanese horror anime for adults. It's a hair-raising erotic suspense in which Enma takes on complicated and gruesome incidents caused by demons who lurk in the darkness. But humans have lit up the darkness of the night with neon lights and turned their world into one that never sleeps, so demons now lurk in the darkness of the human heart. Unfulfilled hearts, suppressed hearts, despair,...such darkness of the heart is the place they lurk. Enma is the Demon Prince of the Underworld, a demon Born of Fire. His mission is to take back or destroy demons that have escaped to the human world from the Underworld. Along with his partner, Princess Yukihime, Born of Ice, and the monster, Kapaeru, Enma sets up Enma's Detective Agency. Tonight, like any other night, they will roam the sleepless city. Horrific incidents that could not possibly be human acts occur one after another. The stench of evil lingers at the scene... Enma's fire rips through the darkness! (Source: Bandai Entertainment)

Osamu and Jay are two cereal salesmen traveling for work when they encounter a barricade. Curious as to what is going on, they step out of their car and enter into a government secret. Two mysterious demon-like men have been terrorizing the military, who came to respond to a car crash involving a vehicle carrying government research material. Inside the car wreckage, Osamu finds a beautiful hermaphrodite with gold and crimson eyes trapped in a frozen chamber. Osamu shares a kiss with them through the glass before he is forced to flee the scene. Osamu and Jay interrogate Jay's father, a top researcher at a government laboratory, who reveals that what Osamu and Jay saw was top-secret, and they would likely be sitting in prison if it weren't for his influence. While Jay is ready to forget everything that happened, Osamu cannot let it go that easily. After stealing a security badge, Osamu finds where the person he kissed is being kept, and learns that their name is Kimera. Osamu wants to run away with the beautiful Kimera, though he does not know why Kimera is being held captive or what a relationship with them means for the future of humanity.