押し釦式電車は冷たく温かい (Oshi Botan Shiki Densha wa Tsumetaku Atatakai)

Background
"Oshi Botan Shiki Densha wa Tsumetaku Atatakai" is an original song by by Mahou Shoujo ni Narenakatta-P featuring CUL along with Aoki Lapis and Yuzuki Yukari in the chorus.