On June 20th, 9nine will be releasing their new single titled, “Ryusei no Kuchizuke”. The song has also been chosen as the theme song for Upcoming drama, ‘Houkago wa Mystery to tomo ni‘! Ryusei “no Kuchizuke” was written from the producer’s request. The producer said: “The protagonist Kirigamine Ryou thinks that she will be able to change the world with her beliefs. She’s positive and walks her own path without caring about what others think of her. We want a song that people can hum to when that protagonist solves cases.” and “The protagonist is a girl, but she calls herself ‘boku’, so we want the words ‘boku’ and ‘bokura’ to be included in the lyrics.”The drama, ‘Houkago wa Mystery to tomo ni‘! will begin airing on April 23rd.