프린치피움 – 널 그린다 (With 정다은 Of 피그말리온)
Track 01 from Single "널 그린다"
Release Date: 2015.07.06
프린치피움 – 그 누구보다 (Vocal 소희)
Track 01 from Single "그 누구보다"
Release Date: 2016.08.29
프린치피움 – 하얀 그리움
Track 01 from Single "하얀 그리움"
Release Date: 2017.01.23
프린치피움 – 그대그대 (슬희 Of 마멀레이드 키친)
Track 01 from Single "ZeoM With You Project Vol.1"
Release Date: 2013.12.30
프린치피움 – 어리광 (With 유예원, 달리)
Track 01 from Single "어리광"
Release Date: 2017.08.01
프린치피움 – 용감한 고양이 (With 화영, 소희)
Track 01 from Single "ZeoM With You Project Vol.3"
Release Date: 2014.09.30
프린치피움 – 2별 (With 새봄, 최현)
Track 01 from Single "ZeoM With You Project Vol.2"
Release Date: 2014.07.14