Never Said Goodbye (2016)

Both are about romance between foreign Korean exchange student & an East Asian country girl. Both star Lee Joon Gi.

A romantic love story between Taiwanese man, Korean man & Chinese woman.
A Korean exchange student in Shanghai who falls in love with a local Chinese girl.
They met again by coincidence. Lee Joon Ki soooo adorable! A must watch intercountry romance movie. Simple yet adorable. I wished they choose other FL ;'(

On a spring day Munakata Ikujou visited an old temple to view a 1000 years old sakura tree. There Ikujou discovered a 3-year-old girl and adopted her as his own daughter. 16 years later, Sakurako has grown up to become a beautiful woman. Sakurako then has a fateful meeting with Takanashi Hiroto. Their pure love begin.

Both Male Leads have a terminal illness.
They hide it from the Female Lead .
Unfortunately both are sad tearjerkers.
Both movies have a good OST with songs from the Male Leads.