One day, Sakura (Sara) is suddenly transported to another world.
There, she saves a boy named Luke, who was being hunted and collapsed due to certain circumstances, and the two begin living together.

Just as Luke’s emotional wounds finally start to heal, Sara is abruptly sent back to her original world.

Three years later, when she returns to the other world, the Luke she reunites with is no longer the boy she knew—he’s now 25 years old, the nation’s top ice mage, a knight with distinguished achievements, and a newly minted baron!

The boy who was once ten years younger has now become an older, perfect gentleman, and he devotes himself entirely to Sara, declaring:

“I’ll dedicate my life to repaying your kindness.”

…And so begins a story where she is endlessly spoiled by her once-little-boy-turned-perfect-knight!