After gaining admission to Han University in Seoul, Yunho is sent to live with his brother, Yunsoo, and his wife, Yoosun. But when he walks on his sexy sister-in-law breastfeeding, he is unable to shake the image from his mind. Coupled with the knowledge that Yunsoo can't satisfy her carnal desires, Yunho is torn between his duty as a younger brother and his hunger for Yoosun as a red-blooded man. But when he becomes the object of the campus bomb more.. shell's desire, it might be just what he needs to serve as a distraction…