More Than Blue (2009)

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K and Cream first meet each other in high school & both are orphans; K was abandoned by his mother after his father died of cancer who nevertheless left him a sizable sum of money, while Cream lost her entire family in a traffic accident. The two become soulmates and come to share a home, though K watches Cream switch from boyfriend to boyfriend as he keeps his own feelings for her to himself. Knowing that Cream's biggest fear is to be left alone, K keeps the fact that he has terminal cancer a secret, and instead he urges her to marry a kind and healthy man. When Cream announces that she is in love with affluent doctor Joo-hwan, K is left heartbroken, but is satisfied that she has met her ideal partner.