Halkara’s new factory has a ghost so she has been unable to hire workers. Azusa summons Beelzebub to help as she is scared of ghosts. Beelzebub forces the ghost to make itself visible, revealing she is a teenage girl called Rosalie who committed suicide centuries ago when her selfish parents sold her to be married to a cruel man. The factory used to be her family home and as a ghost she is trapped in the place she died. Beelzebub reveals if she possesses a human to travel outside the building she will be freed, so Azusa offers Halkara as a convenient vessel, thrilling Rosalie...