Y/n has always had a crush on her next door neighbor, Jacob, ever since they were kids. Due to unforeseen circumstances, they had to move in together and they practically became siblings. Y/n eventually gave up the thought of ever becoming Jacob's lover because Jacob would draw a line in the sand each time she tried to reveal his feelings. But one night, Jacob'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... y/n has to admit, a side of her she does enjoy her feelings being reciprocated, but this feels wrong and unsustainable. What's gotten into Jacob and is there something more sinister at play...? Based on: Double Trap By GOODMEN on Lezhin