City of the Dead.
"Huo Ling." Yi Bing called as they ate.
"Yes?" Huo Ling answered as he chewed on the meat.
"Where is your next assignment?" Yi Bing asked.
"Hm? My next assignment?" Huo Ling wiped the sauce in the corner of his lips. "Why do you ask?" he asked.
Since Huo Ling is Yi Bing's apprentice, Yi Bing can see Huo Ling's next assignment and anything in Huo Ling's Death Note. This is the masters' privilege, and also a responsibility as the master since he still needs to supervise Huo Ling as his apprentice.
This lack of privacy made the other grim reapers dislike being an apprentice, especially if they would encounter a master that uses this privilege of theirs in a perverse way, like stealing their apprentice's points, etc.
