His Sunflower (Fruits Basket Sequel)

It's been 3 years since Hinata was taken to America and stripped of her memories. In that time, the spirit of the rabbit has remained firm inside of Momiji. Despite the long period of separation, Momiji has refused to even think of giving up.

One day, transfer students from America arrive and the girl Momiji fell for was back, having no memory of him and her increased shyness is a minor detail, but after all, he was always a sucker for these kind of romances