The B Rank Missions are only assigned to to experienced ninja. With these missions you are able to unlock villians and subordinates of the most dangerous ninjas.
Mission name: The Yellow Flash Mission type: S-Class Mission
Mission requirements
Rank: At least Jounin
Mission Description
Minato has left Young Kakashi in charge of TeamMinato while he goes to the front lines to assist other Konoha ninjas. While trying to complete their mission Team Minato runs into much more trouble than they bargained for. Now Young Kakashi, Obito, and Rin must fight to survive long enough until Minato can return and save them.
Mission Rewards
Mission "The Yellow Flash" completion. Character unlocked: