Beelzebub T21

Chapters list :
180. The Tournament Starts!! (トーナメントが始まるのダ!!, Tōnamento ga hajimaru no da!!)

181. Showdown! The Strongest Couple!! (対決!最強夫婦!!, Taiketsu! Saikyō fūfu!!)
182. Fierce Battle!! Best 8 (激戦!ベスト8, Gekisen!! Besuto 8)
183. Ishiyama Showdown!! (石矢魔対決!!, Ishiyama taiketsu!!)
184. Semifinals! VS Tōjō! (準決勝!VS東条!, Junkesshō! VS Tōjō!)
185. The Final Decisive X'mas Battle!! 1 (X'mas最終決戦!! ①, X'mas saishū kessen!! 1)
186. The Final Decisive X'mas Battle!! 2 (X'mas最終決戦!! ②, X'mas saishū kessen!! 2)
187. Trial! (お試しダッ!, Otameshi da!)
188. Restored Den of Delinquents (復活の魔窟, Fukkatsu no makutsu)