シリウスの輝きのように (Like the Radiance of Sirius) comes from the World Dai Star (ワールドダイスター) multimedia project, where it was available as a launch-selectable track in the mobile rhythm game World Dai Star: Yume no Stellarium. Composed by Hajime Mitsumasu (FirstCall) with lyrics by Youhei Matsui, the song is a high-energy ensemble piece performed by six characters from the franchise, Kokona Otori, Shizuka, Kathrina Griesbel, Yae Niizuma, Panda Yanagiba, and Chisa Sasuga, each voiced by their respective cast. The arrangement, co-handled by Mitsumasu and Haruka Konno, builds toward a theatrical climax that mirrors the stage-performance theme woven through the lyrics. In maimai DX, the track arrived as part of the PRiSM edition on November 8, 2024, using the original 3DMV from the source game as its in-game video. Its most distinctive musical trait is a sudden BPM acceleration from 158 to 200 just before the chorus, a change that the higher-difficulty charts exploit for dramatic effect. The Re:MASTER chart, designed by Luxizhel, holds the historical distinction of being the first Level 14 ever assigned to a POPS&ANIME category song in maimai, packing dense trill patterns and break-note clusters across its 815-note layout. The Master chart (designed by はっぴー) and Expert chart (designed by まぐランド) each offer their own character at lower level bands, making the set a complete difficulty curve from entry-level to top-end challenge.