Kanta Sato

Ryota (Kanta Sato) is an ambitious young man who comes to Tokyo to become a manga artist, however gives up on his dream and returns to his hometown in Fukuoka. Unwelcomed by his family, crashes at his old friend's place and he is introduced to a job at the local zoo, Enmei ('life-prolonging') Zoo. Ryota knows nothing about the work but he gets help by all the other zookeepers.

The five rival gangs ruling the SWORD district unite to face off against a 500-member strong attack led by a legendary gang leader.