[Naruto] Technology Is the Real Deal

In short, this is a story about traveling from the modern world to the ninja world and finding a way back.

Modern-day character settings:

Hashirama, a late-stage brocon who longs for his younger brother to marry into the family, the next prime minister, and heir to the Senju conglomerate; Tobirama, a research fanatic; Madara, the Uchiha conglomerate's executive administrator; and Izuna, who really runs the conglomerate and handles its gray-area affairs.

Approximate world timeline:

Modern era → Founding era → Fourth Shinobi World War → Modern era → Breaking through the barriers between worlds to allow people to travel between them

Pairings: All x Tobirama (Hashirama, Madara, and Izuna → Tobirama)

The transmigration story draws on the worldbuilding of Honkai Impact 3rd.

Theme: On the differences that arise between similar and dissimilar World Bubbles