Showdown! The Strongest Couple!!

is chapter 181 of the Beelzebub manga.

Characters in order of appearance

 * 1) Tatsumi Oga (flashback)
 * 2) Hilda (flashback)
 * 3) Aoi Kunieda (flashback)
 * 4) Kaname Izuma (flashback)
 * 5) Shizuka Nanami (flashback)
 * 6) Takayuki Furuichi (flashback)
 * 7) Nene Ōmori (flashback)
 * 8) Yuka Hanazawa (flashback)
 * 9) Beelzebub IV
 * 10) Suiten Ikaruga
 * 11) Zenjūrō Saotome
 * 12) Taeko Furuna
 * 13) Black Baby Beel
 * 14) Hidetora Tōjō
 * 15) Hajime Kanzaki