Naruto: Tsunade Is My Beloved Widow

Saito Minato had transmigrated to Type-Moon and become a Grand Caster. He planned to take part in the Holy Grail War, but just as he obtained the qualifications to become a Master, finished making preparations, and was about to summon a certain married fox, the unexpected happened.

He transmigrated to Konoha.

And was he actually Tamamo no Mae's Demi-Servant?

Huh, this world has a Holy Grail War too...

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.