After waking up, Aaron finds himself as the only son of the most notorious playboy duke in the kingdom.

His father’s achievements overshadow the ruler, so he must continue pretending to be a useless wastrel just to stay alive.

The standard transmigration system arrives late, but at least it comes—only to leave behind an awkward gift:

the full power of Arlecchino, the Fourth Harbinger of the Fatui.

The price: when using it, he will completely transform into the cold and elegant female Harbinger.

Even more absurd, the system uninstalls itself and runs away right after giving the reward!

As royal conspiracies shroud his family, and tides of monsters surge toward the borders—

Aaron looks at the gradually changing crimson eyes and silver-gray hair in the mirror, and smiles:

“Who says a playboy can’t be a savior?”

“It’s just… in ‘her’ form.”