曖昧mind (Aimai Mind) is an original maimai song produced by the doujin circle Halozy, best known for their energetic vocal trance and house arrangements in the BMS and Touhou arrange scenes. The track features vocals by Chiemi Nagao (長尾ちえみ), a frequent Halozy collaborator, with a video by murAta Yuzi. Added to maimai MURASAKi PLUS on September 7, 2017, the song sits at a steady 135 BPM with a light, sentimental pop energy, its lyrics describe wavering feelings under a rainy sky, caught between hesitation and falling in love. The jacket and music video stylize the title as アイマイマインド (a phonetic play on "aimai mind") rather than the kanji-heavy 曖昧mind, giving the song a distinct visual identity. On the charting side, both the Expert and Master difficulties incorporate a well-known lyrical gimmick: the phrase "右へ左へ揺れる My Heart" (swaying right and left, my heart) is expressed through straight-line Slide notes, horizontal on Expert, vertical on Master, making the musical and lyrical content directly visible in the choreography of the chart.