Idel Fleure was born without a scent in a noble family where fragrance defines one's lineage, causing her to be ostracized. She escapes a forced marriage by being accepted into Euphiter Imperial University, but finds herself bound in another marriage—one to Archduke Chaeron, who is drawn to her scent that only he can smell. Chaeron proposes a contractual marriage, and agrees to take her as his wife for three years and then divorce her. Will this seemingly contractual partnership conclude as smoothly as planned, or will the Archduke's fascination with Idel's scent lead to a different ending?