Chain Chronicle: The Light of Haecceitas

Humans, fairies, and other mythical creatures live in peace on the continent of Yggdra until a mysterious group called the Black Army appears. To protect their home, the citizens of Yggdra join forces to form a Volunteer Army, led by Yuri. But the Volunteer Army is quickly defeated and the continent fades into darkness. As they retreat, Yuri encounters a young boy who offers a glimmer of hope.