I Was Kicked Out of the Brave Team and Accidentally Became a Ninja

Also known as: What should I do if I am kicked out of the brave team? Go be a ninja After defeating the general of the Demon King's army, Rein, a support staff member of the team, was expelled from the brave team because his strength was too low. However, not long after I left the team, an old man who called himself Madara Uchiha wanted me to become his disciple. What should I do? I'm waiting online. It's urgent... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.