Gon and Killua continue their training with Biscuit as the Mad Bomber wreaks havoc upon the other players in Greed Island. As their strength increases, Gon and Killua also start searching for the hundred cards needed to complete the game. As their number of cards increases they must now prepare to face off against Razor, the leader of the 14 Devils, and the Mad Bomber himself.
Shirahama "weak legs" Kenichi is a typical high school student with typical problems: he's frequently bullied and tends to run away in the face of his enemies. Things change when Kenichi meets Furinji Miu, whose grandfather runs a dojo; and not knowing what he's getting himself into, he signs up to become a disciple. As Kenichi's life-threatening training continues and he becomes more and more powerful, he inadvertently becomes the target of the deadly gang called Ragnarok. With mental and physical challenges ahead, can Kenichi survive his encounters with Ragnarok, or will the masters of his dojo get to him first?
In this HxH OVA Killua and Gon are training with Biski to become a lot stronger. History's Strongest Disciple Kenichi is a story about average guy on street that happens to meet his destiny and be trained with various martial arts to become stronger.
Where Gon and Killua had a clear goal in their mind to be able to survive in this game and in future, Kenichi wants to become stronger so he won't be bullied anymore, but stronger guys only will appear so long before you stand on the top!