"Once Again, But With Four!" Ren decides to challenge the Colosseum after being inspired by the epic battles between monsters. But Aoi's a stickler and wants to do things right before joning the fray. â–½ A Night At The Colosseum [Int'l: renamed English title] â–½ Mayonaka no monsutokoroshiamu [Japan: original Romaji title] â–½ Midnight at the Monster Colosseum [Japan: literal English translation]