Yuyu Hakusho, Vol. 16: Into The Demon Plane!!

A delinquent’s gotta do what he’s gotta do…in the afterlife. Yusuke Urameshi was a tough teen delinquent until one selfless act changed his life...by ending it. When he died saving a little kid from a speeding car, the afterlife didn't know what to do with him, so it gave him a second chance at life. Now, Yusuke is a ghost with a mission, performing good deeds at the behest of Botan, the ferrywoman of the River Styx, and Koenma, the pacifier-sucking judge of the dead. Itsuki locks the others away in a separate dimension so Yusuke and Sensui can fight undisturbed. Under intense pressure, Sensui's real personality, suppressed for so long, starts to come out. Then Koenma shows up and things really start to get hot, forcing Yusuke to resort to desperate measures to draw their enemies out. Kuwabara and the rest of the crew escape Itsuki's clutches and plunge into the Demon Plane after Sensui. Meanwhile, the Underworld special defense force goes looking for Yusuke. What secret do they know about Yusuke that is enough to sign his death warrant?