I've Got a System, but I'm a 2009 Model!

Was it a modern person whose soul took over Zero's body, or did Zero gain a modern person's memories and a System? We don't know.

When Saga embodies miracles and hope, and an undiminished Zero roams through different worlds with the Ultimate Force Zero, saving lives plunged into despair...

Enjoy the thrilling story of an undiminished Zero from 2009 after he gains a System!

(Warning) There is one heroine, Eme--sorry, Emeera. Honestly, Grigio showing up as the little sister was too abrupt. I like this Ultra, but I don't like this pairing, and she appears far too late.

Then there's Saga itself, or rather, according to this book's setting, Zero and Emeera will eventually become a legend: Saga. In other words, they'll become an existence like Cosmos and Justice.