Super-deformed version of Hokuto no Ken, Buronson & Hara Tetsuo's post-apocalyptic fighting manga. Note: The "DD" stands for "Design Deformation," since the characters are only "two-heads-tall." (Source: AniDB)

The "Nyanbo" are creatures with square bodies with ears and tails that came to Earth from outer space. There's Tora, who dreams of repairing their broken UFO and returning to space, as well as his sister Kotora, the precocious Shiro, the mischievous Mike, the mysterious Kuro, and many more. All of these Nyanbos are now happily living much like cats, free-spirited and sometimes getting into trouble, in places that humans don't know about. (Source: Crunchyroll)

Transfer student Takisawa Noboru quickly learns that all disputes at his new school are settled in the boxing ring. Now he finds himself in a series of showdowns with the local top dog, Ibuki Saburo, for the love and respect of the beautiful Yukari.

The story revolves around a girl named Yuuka, who encounters a being from the depths of the Earth named Chii-chan (a pun of chiteijin, the Japanese word for underground-dweller), and an alien named Ucchan (a pun of uchuujin or alien). The story follows their heartwarming and chaotic everyday lives together.