Autumn's Concerto

Both have love triangle and a the male lead has lost memory.

Both have unplanned pregnancies and the couples in both dramas are constantly misunderstanding each other.

Hyun Jae is only 19-years-old, but he has a terminal illness and he does not have much time left to live. He leaves the hospital and goes back to high school. There, he falls in love with Soo Min.