La PomPon brings the fourth single. Features an outro theme of "Case Closed (Detective Conan)," which is a cover of one of the popular theme song of the series "Unmei no Roulette Mawashite" by ZARD. Limited edition additionally includes "Roppongi Taiso - Ai Kotoba wa Janparapon! -" and comes with a bonus DVD featuring a music video of "Unmei no Roulette Mawashite" and its making-of. Also includes a member's solo trading card with a handwritten message (printed) randomly selected from seven kinds.