Ramune

Ramune is a doctor who specializes in treating patients with "mystery diseases," which are caused when something "strange" sneaks into the hearts of the weak-minded. He is a foul-mouthed physician who is rude to most and very rarely understands the atmosphere around him. Though, he is a very skilled doctor who can quickly identify the root cause of any strange illness. But because he always puts his patients first, he tries not to treat them too harshly.

(Source: Official Site)