エンドマークに希望と涙を添えて (End Mark ni Kibou to Namida wo soete) is a high-tempo instrumental track composed by cosMo＠暴走P (cosMo@Bousou-P), a Vocaloid producer renowned for technically demanding, BPM-defying compositions such as "The EmpErroR" and "初音ミクの消失." Originally debuting in SEGA's CHUNITHM in 2015, the song was ported to maimai as part of the MiLK edition on April 24, 2018, under the ONGEKI & CHUNITHM genre umbrella, one of several tracks bridging the three SEGA arcade rhythm games (ゲキ！チュウマイ). Clocking in at a blistering 257 BPM, the piece is entirely instrumental, driven by relentless synthesizer arpeggios, rapid-fire percussion, and a triumphant melodic line that evokes a climactic end-credits sequence, befitting a title that translates roughly to "Adding Hope and Tears to the End Mark." The maimai version runs approximately 2 minutes 18 seconds, notably shorter than the original 2-minute-48-second CHUNITHM cut, likely to accommodate the recording-length restrictions of older maimai cabinets. This same shortened version carried over to subsequent ports in ONGEKI and Project Sekai: Colorful Stage! feat. Hatsune Miku, where the song gained renewed attention and an enthusiastic, if ironic, community meme about its unlikely arrival in a Vocaloid-centric game. The jacket art features the character Astraea (アストライア), a recurring figure in the CHUNITHM universe.