Ecchi fighting manga Maken-Ki! was previously adapted into a 2011 anime series by AIC, but the upcoming OAD, shipping with the limited edition of the manga's 11th volume, is coming from Xebec with Hiraku Kaneko (Seikon no Qwaser) directing using Akio Takami's (Uppotte! ONA , Kanokon , Ladies versus Butlers ) character designs. Highschool of the Dead's Kuroda Yosuke will be writing the tropical island episode.
The new character designs have recently been revealed.