Jinsung has always had a crush on his next door neighbor, Yura, ever since they were kids. Due to unforeseen circumstances, they had to move in together and they practically became brothers. Jinsung eventually gave up the thought of ever becoming Yura’s lover because Yura would draw a line in the sand each time he tried to reveal his feelings. But one night, Yura’s behavior begins to change. He seems to be turning into a different person in the evening... someone with an insatiable lust for the physical… Jinsung has to admit, a side of him does enjoy his feelings being reciprocated, but this feels wrong and unsustainable. What’s gotten into Yura and is there something more sinister at play…?