Unaired anime-original OVA bundled with 12th volume of the Hitsugi no Chaika novel.

The second season of Bye Bye, Earth. Adonis returns, empowered by darkness, as Belle awakens from her slumber — their fates bound by an inescapable destiny.

Set in the future Kei and Yuri are Trouble Consultants for The 3WA. Code Named "Lovely Angels", but, they are known throughout the galaxy as The Dirty Pair. They always solve their case, but, not without causing collateral damage and mayhem.