Strongest Old Man

is chapter 40 of the Beelzebub manga.

Characters in order of appearance

 * 1) Kunieda's Grandfather
 * 2) Tatsumi Oga
 * 3) Aoi Kunieda
 * 4) Beelzebub IV
 * 5) Kōta Kunieda
 * 6) Hilda