The Kurosagi Corpse Delivery Service by Eiji Ohtsuka and Housui Yamazaki (amazon.com)

“Man, it sucks being an entry-level Buddhist.”

A group of students with unique talents at a Buddhist university find that their skills make them totally unsuited for normal work, so they band together to form the Kurosagi Corpse Delivery Service. They decide to help the dead who are trapped in their bodies, unable to move on. Kuro uses his psychic powers to speak to the dead. Tough guy Numata can dowse for corpses. Makino is a slightly ditsy embalmer who studied her trade in America. Yata channels aliens through his hand puppet. Ao is the group leader.
The manga follows a familiar episodic format. In every chapter the group finds a new corpse and they have to figure out what they need to do to give the spirit peace and hopefully get paid somehow. The interactions between the students as they start their new job are really funny. Kurosagi Corpse Delivery Service features plenty of dead bodies in various stages of undress, so this is a title for mature readers. The manga also has a sound effects glossary in the back.