[InoIta] A Promise

During Tobirama's first experiment with the Flying Thunder God Technique, something went wrong, and he ended up in the era of the Sage of Six Paths, where Indra found him while out on one of his usual training sessions.

Startled by the way Tobirama had appeared, and afraid bringing him home would cause trouble, Indra settled him in a small cabin on the mountain where he usually trained.

Since Tobirama couldn't handle the power of time and space, he was left with scars, including the three red stripes on his face.

Thus began their story of meeting, getting to know one another, falling in love, and parting. It was a romance spanning a thousand years.

For the sake of the plot, Tobirama was summoned back. Though, in Indra's eyes, it was the Sage of Six Paths breaking them up, so...

"I'll stay alive so I can meet you again. That's my promise to you. So, Tobirama, you'll wait for me, right?" - Indra