And So, One Hundred Years Later, The Magician Noi Galenée Becomes a Bride (WN)

Noi Galenée was the kingdom’s greatest mage who saved the world.
She was believed to have died with the Demon King, yet a hundred years later—she awoke in a man’s arms.

“Won’t you be my bride?”
“—…Y-yes?”

That man turned out to be her once-beloved disciple, Kardia.
And on top of that, Noi had somehow lost her mana—and was in a child’s body!
Thus began a life-or-death con-game rom-com between a highly suspicious disciple over a hundred years old and a bride-to-be with no mana who couldn’t risk being recognized—curtain up!

—This was the story of two lonely souls, tossed by fate, who spun hope together.