Shujii

From Fantasyshrine:

1-3) Physician In Charge
Due to an accident, which caused his memory loss, Tomoya doesn't remember his family nor his lover, Iori. However, it never changed Iori's love for Tomoya! As Tomoya's primary physician, Iori brought Tomoya to the U.S. for treatment, as well as a new start for their future together?

4-5) The Thorn In The Heart
Continues the story of Sou and Sugino.

Extra) Dr. Yagi's Clinical Records