Idarui Sonyeo (LOONA & YeoJin)
- Idarui Sonyeo (LOOΠΔ & YeoJin) (이달의 소녀 (LOOΠΔ&YeoJin))
- Kiseuneun Daeume (Kiss Later) (키스는 다음에) (YeoJin)
- My Sunday (HeeJin & HyunJin)
- My Melody (HaSeul & YeoJin)
"Idarui Sonyeo (LOOΠΔ & YeoJin)" is a single released by LOOΠΔ & YeoJin as part of YeoJin's reveal. It is the eighth single released by the group LOOΠΔ as part of the promotion leading up to their debut.