When SasoDei Came to the Warring States Era

The red-haired ninja lay in his parents' arms, two swords piercing his chest. "Father, Mother, I've finally waited... for you. Deidara, I'm sorry. I broke my promise after all."

The blond ninja shouted, "Art is an explosion!" while thinking, "Danna, wait for me." Then he perished amid a chorus of explosions.

During the Warring States period, a red-haired child was born into the Senju clan, and the Uchiha clan gained another blond child.

In short, Sasori and Deidara transmigrate to the Warring States period and help Madara, Hashirama, Izuna, and Tobirama build Konoha. The story focuses on Sasori and Deidara, and Madara and Hashirama, with Izuna and Tobirama as a secondary pairing.