Masafumi Hina is an otaku with a love of romance! She dreams of one day having a seaside romance, but those dreams are dashed when she and her classmates get into a bus accident on the way to a beach resort for a school trip.

She has now awoken as aristocrat Soleil Lorainne, a side character from her favourite novel, the Saint's Thorny Road, a regressor story where there are two timelines: One doomed and one saved. Unfortunately, Soleil is slated to be executed in the doomed timeline! With romance out of reach, she must figure out a way to survive the disasters awaiting the people in the world of her novel with the help of the mysterious Duke Sinclair who may be more than what they seem.