Yoru no Yomeiri

It's summer, and Yoru Sanjou's grandfather has just passed away. Knowing that she had no other living relatives, her grandfather left behind a pre-filled marriage registration form, indicating his dying wish for Yoru to marry his attorney Akito Tsukishima. Yoru agrees, but considers it only a marriage of convenience, meant to protect her late grandfather's estate. Indeed, she believed that this was a loveless marriage, until she discovered the maddeningly painful feelings of love Akito had been keeping to himself all along...