Interlunium is an idol group under the I MY ME label, consisting of 11 vocalists.They debuted on December 25th 2017 with the song Intergalactic Disco, which featured seven of the vocalists. Four more idols were added to the group later, along with producer Lina. They are considered rivals of solo idol Ume Takeuchi, the group Pastel Project, and the group Kerberos.