Good bye, Merry-Go-Round. is an instrumental Amusement Hardcore track composed by Yooh, originally created as a boss song for Sega's rhythm game ONGEKI SUMMER. True to its title and genre classification, the piece is built around a carnival and amusement-park motif, driving forward at a relentless 185 BPM with Yooh's signature hardcore production style, crisp synth leads, pounding kick drums, and layered melodic hooks that evoke the bright, chaotic atmosphere of a fairground ride. The song debuted in ONGEKI SUMMER in January 2020 as part of side chapter 5, "千夏の潜入大作戦" (Chinatsu's Infiltration Mission), where the player faces opponent Hinata Chinatsu at Lv.70. It later crossed over into both CHUNITHM PARADISE LOST and maimai DX UNiVERSE PLUS as part of Sega's ongoing rhythm-game collaboration ecosystem. In maimai, it arrived on March 24, 2022, initially unlockable by playing the corresponding ONGEKI title, with a general unlock following on May 13, 2022. Beyond Sega's arcade titles, the song has also appeared in lowiro's Arcaea and NEOWIZ's DJMAX RESPECT V, cementing its reach across the rhythm-game landscape. A long version and a remix by Kobaryo (Kobaryo's FTN-Remix) are included on Yooh's album HYPER FULL THROTTLE, with a short version of that remix later featured in ONGEKI Re:Fresh. The maimai charts span Basic through Master, with the Expert chart designed by 翠楼屋 (Suirouya) and the Master chart by あまくちジンジャー (Amakuchi Ginger).