From October 2016 until June 2018, each member of the group was revealed along with a solo single album and a music video for the title track. The complete group debuted on August 19, 2018 after holding their debut concert, LOONAbirth. They held their first comeback with [X X].
LOONA 1/3 (Hangul: 이달의 소녀 1/3) is the first sub-unit of the girl group LOONA.
|03||SBS Power FM 'Young Street' (ViVi, Choerry, Yves)||8PM|
|04||bntstar Photoshoot (HeeJin, ViVi, JinSoul, Yves, Go Won)|
|07||88rising 'Asia Rising Forever' (HaSeul, Kim Lip and Olivia Hye absent)||10AM|
|08||V-LIVE '3Jin's Art class' (HeeJin, HyunJin and YeoJin)||8PM|
|11||Fact in Star recording (YeoJin, Choerry(guests) and Yves(host))||4PM|
|14||Frequency of the Moon Ep.23 (ViVi, JinSoul and Chuu)||04:30PM|
|16||"Love Battery" (og. Hong Jinyoung) cover on Immortal Songs (LOONA minus HaSeul, Kim Lip and Olivia Hye)||6PM|
|22||V-LIVE 'We invite you to Yves' Birthday' (Yves, Go Won, Choerry)||8PM|
|Fact in Star broadcasting (YeoJin, Choerry(guests) and Yves(host))||9PM|
|23||Kim Lip's 3rd Debut Anniversary|
|Remote fansign 'Orbit Ring'||5PM|
|Oh! My Part, You (Chuu)||9PM|
|25||Fact in Star starring Ryu Sujeong (Yves MC)||5PM|
|30||yyxy's 2nd Debut Anniversary|
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