I was looking forward to this drama and had high hopes. Unfortunately it did not work for me.

The key issues were:
A) the relationship between Saeko and Yasuke didn’t build up properly. They started as a holiday fling and jumped early to bed which felt forced. I didn’t feel invested in their love at all.
B) Kazumasa emotionally and physically cheating on his wife (even explained by the gravitational pull of Yasuke’s heart) felt wrong. His wife had stood by him through dark times and loved him unconditionally. She deserved better in my view
C) the transplanted heart having memories made no sense. How can a muscle essentially give you vivid flashbacks and images? I know it’s fiction but it didn’t make a lot of sense to me.

On the plus side, the cinematography was beautiful and the performance of Kentaro Sakaguchi was excellent.

This fell short of my expectations and I wanted to care about the characters more…