Koi no Seizu to Nekobiyori

After an unfortunate incident, Tsubame leaves England and returns to Japan with a broken heart. She moves in with Rio, an English man living in Japan, because their grandmothers were best friends. But then she is told that Rio would be her fiancee, because they are destined to be together, as foretold by the stars...! (Source: Akita Shoten, translated)