A forgotten cybernetic hero awakens with no memories and is thrust into a brutal conflict between humans, robots, and a rising new species—forcing him to confront the truth of his own creation as he fights to save two kidnapped children trapped deep below a dying wasteland.

He was forgotten for fifty years. Now he’s the only one who can save them.

When two girls vanish into a deadly mine run by rogue machines, a dying old man awakens Casshan—a lost cybernetic hero with no memory and a human heart buried inside metal. But underground lies more than hostages: a hidden robot refuge, a radical new species, and the truth about Casshan’s own creation. Caught between humans, robots, and a new species called Neoroiders, Casshan must confront the past he’s forgotten before the world destroys itself again!

About The Author

Mario B. Long

Mario B. Long is a Detroit-born manga creator, game producer, and entrepreneur based in Tokyo, Japan. He is the founder and president of Sakura-Phoenix Studios, one of the first Black-owned manga and game-production companies in Japan. Under his leadership, the studio launched the manga series God Tier, and Long regularly appears at major international comics and anime conventions to promote the studio’s work. With over 20 years of residence in Japan, Long has become a cross-cultural figure in the manga industry, advocating for increased diversity and global creator collaboration.

About The Illustrator

Kusanagi

Kusanagi is a Tokyo-based mangaka who has previously won excellence awards in Coamix's Silent Manga Audition. When time allows, Kusanagi enjoys sharing his journey as a manga artist and insights into the Japanese manga industry on his YouTube channel.