Toscana no Chikai (2012)

Blurb:
Aromatherapist Sienna is having the worst year of her life. She lost her job, was betrayed by her lover and her mother is suffering from illness. To top it all off, she receives an eviction notice from her apartment complex. But all of her problems could be solved if she obtains the inheritance left to her by her late father. There is but one condition: she must be happily married. Sienna asks a recent acquaintance, Keir, who needs money to save his company, to be her “hired husband.” Surprisingly, he agrees, but has one condition—that for the duration of their contract, their marriage is the real thing!

Source: www.anisearch.com/manga/31237