for download on January 20, 2016, and the full game was released as a limited edition version on February 26, 2016. A special edition version of the game to commemorate the anime adaptation was released on February 24, 2017. A PlayStation Vita (PSV) version of the game was released on September 28, 2017. A sequel game titled or The Princess, the Stray Cat, and Matters of the Heart 2 was released on October 27, 2017. Four new characters appear in the sequel game: , , , and . Related media Print A 128-page guidebook for the game titled published from Enterbrain on June 24, 2016. A light novel adaptation written by Kentarō Kobayashi will be published from Ichijinsha on June 30, 2017. A manga adaptation, illustrated by Eku Takeshima, titled will begin serialization in the August 2017 issue of Dengeki G's Comic to be sold on June 30, 2017. Nobuchina Takada is the main protagonist in the manga. Anime Before the game's release, a short anime television series adaptation was announced on December 29, 2015. The series is directed by Kenshirō Morii and written by Hato. It aired from July 12 to September 20, 2017 on Tokyo MX and Sun TV as a 12-episode series of five-minute shorts. The anime television series' Blu-ray and DVD will be attached to the PlayStation Vita version of the game. An Internet radio show to promote the anime titled began airing on May 25, 2017. The show is produced by HiBiKi Radio Station and is streamed online every other Thursday. It is hosted by Atsumi Tanezaki and Yuri Yamaoka, the voice actresses of Yūki Asuhara and Nobuchina Takada. A new anime project has been announced on November 29, 2018. Music The game's theme song is . It was written by Hato, composed by Drop, and sung by the voice cast of the main female characters: Yūka Kotorii, Sora Haruka, Misaki Kamishiro, and Hana Kiritani. The song is used as both the opening and ending themes. There are four insert songs: "Re:Start!", written by Yukinoren, composed by Re-D, and sung by Yukinoren. "Brave Guardian", written by Shiki, composed by Re-D, and sung by Yukinoren. , written by Tono, composed by Rimo Shinnosuke Mori, and sung by Tono. , written by Hato, composed by Pomi, sung by Shirome, and violin performance by Rina Akiyama. The game's original sound track titled was released from Harukaze on May