In A Heartbeat - Larry Stylinson [complete]

When Harry meets his new roommates, he is immediately captivated by one of them. But what happens when he discovers Louis' dark, bloody secret? And will Louis be able to handle his blood thirst?

hoping this cold blue water scrubs me clean and spits me out again (Larry AU)

"Stay," Harry whispers desperately, pressing his lips to Louis' temple like he can somehow ease the pain that's blooming there, but he can't make the pain stop and no matter how hard he tries he can't make Louis stay. All credit goes to phantasmagoria (whiteteethteen) on Ao3.