Short version:
One day, the leader of a Mingjiao raid group realizes their regular team is short on members, so he asks his friends to recruit more apprentices.
His friends ask, "Are you going to train them?"
The leader says, "Fine, I'll do it."
The leader later: "I didn't mean this kind of training!!!"
The story also brings the Naruto characters along to play the game, but the gameplay mainly involves dungeons and casual activities, with more attention paid to everyday life.
The apprentices come from different timelines and worlds, and include both children and adults. He won't take on too many apprentices at once, or he'd never be able to keep up.
Theme: Unity and friendship