Mika year high school student who secretly falls in love with a classmate named Hiroki. From normal girl who has never been in love, love becomes extremely profound. But Hiroki left her for no reason. Mika gutted and love that become deep wounds. But then, on the night of Christmas Eve, Mika met Hiroki again. Mika knew Hiroki leave her because Hiroki cancer. Then, Mika took care Hiroki until he death.