The Galaxy Bat Hero's Mushoku Tensei

Mushoku Tensei × Honkai: Star Rail

A crossover to delight fans of both series

Mambo~ Little Grey Hair accidentally transmigrates to the world of Mushoku Tensei.

In the final battle on Amphoreus, the Galaxy Bat Hero, Stelle, perished alongside the “Iron Curtain.”

When she opened her eyes again, she found herself a bawling newborn, born in another world called the Six-Faced World and given the name Rudia Greyrat.

The Stellaron had not vanished. It had transformed into overwhelming magical power, hidden within her tiny body.

At two and a half, she cast advanced lightning magic without an incantation. At three, she had mastered swordsmanship theory. She was on the verge of reaching the pinnacle of life... but this world was far more complicated than she'd imagined.

Her dad, Paul, wanted her to inherit his swordsmanship style. Her mom, Zenith, was eager to bundle her off to a magic academy. And, most absurdly, there was someone in this world who called himself the “Man-God,” watching her from the shadows and occasionally visiting her in dreams to offer “helpful advice,” all of it a trap.

But who was Stelle?

She was the woman who kicked the Doomsday Beast, punched Cocolia, ganged up on Phantylia, and searched every trash can in the galaxy.

Another world was nothing more than a new map to explore.

She just hadn't expected this world to have an unexpected “side quest” waiting for her, on top of getting stronger and blazing new trails:

Should she forge a new path or win over new companions? Only children make choices.

The Galaxy Bat Hero always takes everything.

Because rules are made to be broken!