Otsukaresama, Kurose-Kun summary:

I feel like I forgot about someone important...Plagued by nightmares of his old hometown, Yuuma Kurose, a lonely boy with the ability to see ghosts, feels inexplicably drawn back to the place from his dreams. There, he stumbles upon Kaito Kiriyama, a boy shrouded by terrifying spirits. With a serious look in his eyes, Kaito vows he'll protect Yuuma. But the moment their skin makes contact, the spirits surrounding Kaito started to possess Yuuma!