As a prophecy of doom unfolds on the peaceful land of Britannia, a purehearted boy sets out on a journey of discovery — and revenge.

After Bon accidentally intervenes in a Time Patrol case, he must join Agent Ream in saving innocent lives from the past — while watching history unfold.

Spin-off series from Ranking of Kings (2021) that recount the side stories which took place in-between the main events of the original series.

Haiji wants to enter the Hakone Ekiden marathon with his dormmates, but they all have to train first!.