Toujuushi Bestialious

Toujuushi (Bestialious) (闘獣士(ベスティアリウス), Tōjūshi (Besutiariusu)) is a Japanese manga series written and illustrated by Masasumi Kakizaki.

Toujuushi Bestialious originally began as 2-part one-shot published in the Issue 2011-11 & 2011-12 of Weekly Shonen Sunday in February 2011. Later in July 2013, around 2 months after Kakizaki finished his last work, an announced revealed that Kakizaki will turn Toujuushi Bestialious into a series in Weekly Shonen Sunday starting from Issue 2013-36-37 in August.

Plot
A.D 70 The mightiest empire Rome started conquering the world. The whole Europe was havocked by Roman's foot. In Ablion, in order to protect their homeland, the Bravest Wyvern fought a bloody battle against the invader...