The Forbidden Girl

Kim Sunwoo has a big secret.
It is a very dangerous one will tear apart his group of friends forever if revealed. It is a secret that will destroy his friendship with his best friend if it is brought out to light, a secret that will surely result in his murder committed by his best friend Jun Wook, a secret that he has tried his level best to be kept hidden from others.
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Lee Ji Ah, Jun Wook's younger sister is the forbidden girl; off-limits to all the three boys in his tight knit group; has always been.
But Sunwoo is finding it more and more difficult to resist the temptation of tasting the forbidden girl's red lips, especially since the attraction that he has tried so hard to hide and his feeling which he has tried so hard to deny; threaten to spiral out of control.
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This is a cliched romance story retold in a steamy and passionate non-cliched way.