The Secret Story of the Strongest Tag Team!!

Summary
A's flashback continues. The two "brothers" go on several missions one of which included Killer B's cousin who tells A that Killer B would need something to fill the void that would be created after becoming the next jinchūriki of the Eight-Tails. Sometime later, A clashes with Minato for the first time. Minato tells A that he should find out his brother's values as a person before he became neither a human nor a jinchūriki.