Cheonjae Uisa Lee Mu-Jin

Who needs studying when you’ve got the ghost of a 1950’s doctor by your side?!
High schooler Mujin escapes the ER with a mystical scalpel, and now he and Aclé, a ghost doctor, are stuck together. With Aclé’s intellect and Mujin’s bravado, the two make the best of their situation, acing exams and saving lives! But their escapades are catching unwanted attention. Everyone from the mafia to esteemed doctors want in on Mujin’s talents, but no one knows Aclé exists! And with Death looming around every corner, how long can they keep up this charade?

(Source: Tapas)