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. [Written by MAL Rewrite]

The franchise's story is set in a world over a decade after futsal has skyrocketed in global popularity. Protagonist Haru Yamato watches the championship of the U-18 world cup and is inspired by a Japanese player named Tokinari Tenōji. He joins the Koyo Academy High School's futsal team with the goal of becoming a player like Tenōji. There, he finds friends, and together they face their rivals.

The OVA will be bundled with the 7th volume of the manga, scheduled to ship on August 26, 2015. It will be a sea bathing episode. (Source: MAL News)

This special will have the Straw Hats fight Foxy again in the New World on Nebulandia, an island that nullifies Devil Fruit powers.