Kunihiko Yasui

In the near future, the demons prepare for a new assault on earth, which is protected by the guardians, a struggle that has gone on for eons. The dark masters have found ways to release the demon inside humans, and the first victim is Eiji, just at the moment he becomes engaged. The earth's guardian, Tsunami, teams with Eiji's fiancée to set up a final confrontation. The earth's fate hangs in the balance. (imdb)

Kakugo and Harara are two siblings who have been trained to fight demons, monsters, and other creatures that are now roaming about in the post-apocalyptic 21st century. Along with their superior fighting techniques and specialized skills, they were also given special suits called Zero armor, which were made from the souls of dead warriors. Unfortunately Harara succumbs to evil within the Zero armor, and Kakugo is the only human alive that has the skills and equipment to defeat his sibling. (Anime News Network)

Mad science runs in her family, but Hikaru has always been an ordinary girl. It's a dream come true when she discovers that she's really a super powered alien! With her hyper-speed battle mecha, the Grandoll Armor, she is humanity's last hope against a hideous alien invasion. (DVD Cover)

The four episodes are set in Southtown, the imaginary city well known to all fans as the stage of numerous death matches throughout the KOF series. Many past heroes of the saga make their appearance here, and the four plots intertwine to create a large-scale drama, that is also linked to the story of KOF Maximum Impact 2. (letterboxd)