Unaired episode 11.5 included with the second Blu-ray/DVD volume.

Who would have ever thought that the most feared gangster of his time now spends his days as a modest househusband? Seemingly giving up the way of the yakuza, the legendary Immortal Dragon Tatsu, best known for his prolific skirmishes against rival gangs, has abruptly vanished. Unbeknownst to most, however, Tatsu is currently staying at an apartment with his wife, doing his best to live a peaceful life. Donning his trusty apron, Tatsu is now striving to become an efficient homemaker. Because of this, he has mastered the required skills—be it cooking the most delicious dishes, making sure to get the best deals at supermarkets, and everything in between—garnering the surprise of both of his former subordinates and enemies alike. Despite being a man with quite a controversial past, Tatsu's new way of life will only be more eccentric from here on out!

Venturing into the wilderness, the skeptical Ryouta Murakami and the ambitious Kuroneko were on a quest to prove the existence of extraterrestrial life when a tragic accident occurred, reaping Kuroneko of her life and leaving Ryouta in a critically injured state. Ten years have passed since the disaster, and Ryouta is now living a normal life in high school. He vows to prove that aliens are real in honor of his late friend. A transfer student named Neko Kuroha unexpectedly arrives one day, bearing a striking resemblance to the late Kuroneko—even sharing a similar name. Most mysteriously, she seems to possess supernatural powers. As Ryouta takes more interest in Neko, he is drawn into a deadly world where dangerous scientists hunt magic-wielding witches that have escaped from their secret research laboratory. Neko is one of these escapees, but there are many others who are in similar situations, and it's up to Ryouta to protect them from their would-be captors.

Gokicha is a small cockroach girl who has moved from Kanto to Hokkaido. She hopes the people in Hokkaido, who are less used to her kind, will become her friends. Despite her best intentions, however, she always seems to find herself on the bottom of someone's shoe or covered in insecticide. As Gokicha and her friend Chaba try to make it on the streets, it becomes apparent that the lives of cockroaches are full of peril.