I thought he was gonna die falling out the window. Instead he got much worse. I believe the saying "A bad woman can lead good man to ruin" applies here.
That horror tag...
Ah yes, nothing is more expensive than free, as someone once said.
He may not have paid in money, but he eventually paid for it with his life.
It slowly but surely began to ruin him as he kept being drawn back to her, until he literally fuses into her, huh.
Horror indeed, Iwasaki Yuuki never fails to deliver on releases with that tag.