Nemuri Netarou Arawaru!!

Nemuri Netaro will solve your sleeping problems, whatever it may be. Whether you can't sleep, have constant nightmares, or simply want to see better dreams, he's there to help. His latest customer, Tonko, has always been haunted by the same nightmare every night before she transfers to a new school. Tonko will now have to face the astonishing facts of the dream world with the help of Netaro!

(Source: MangaHelpers)