Yumekui Merry

Synopsis

Yumeji has the power to forecast a person's dream based on the multicolored auras that surround them when he looks through his fingers. His skills are unpolished, but when he sees a black aura, he knows for certain what that person will see that night, a nightmare. Yumeji has been having nightmares himself recently, where he is chased endlessly by an army of cats until he awakens. But when a strange girl named Merry literally falls into his life, his experience with dreams becomes bizarre and dangerous when he vows to help Merry return to the world of dreams from whence she came.

Synopsis & details from MangaUpdates