I Came to the Shinobi World with Lightning

I transmigrated to the Naruto world carrying lightning and became the Fourth Hokage's brother-in-law.

Your humble junior studied under the Third Hokage, Hiruzen Sarutobi. Minato, my nephew-disciple, from now on I'll call you my nephew-disciple, and you can call me your little brother. We'll each use our own titles.

Teacher Sarutobi, you're a relic of the old era. Stop meddling in the new one!

My dancing is even better than Madara's!

P.S. Naruto, Konoha, the ninja world.