Ninjago: I, Kai, Won't Pull My Punches

(Important: The protagonist is not Lie Hai Wang transmigrated! The only similarity between the protagonist and Lie Xiao Long from Baki is their form of address!) After the ice ninja Zan sacrifices his life to take the Lord of Darkness down with him, the ninjas, unable to bear the loss of their comrade, leave the team and go their separate ways. Lloyd, the Green Ninja, keeps trying to bring the team back together without neglecting his training, but he makes no progress. Then one night, Nia overhears Master Wu and Garmadon talking. From their conversation, she learns that a powerful enemy is about to return and intends to target the Green Ninja. Looking at the team, now torn apart, Nia realizes this is their chance to reunite.