Compared to August, there are around same number of kpop girl groups debut or comeback at September.
(For certain reason, I will not include some information for certain group even I know some internal information for privacy issue.)
CLC - Helicopter
On September 2, CLC released their single, "Helicopter." Described as a "trap pop and EDM powerhouse song", "Helicopter" was co-written by member Yeeun.Helicopter got 10 Million views in 34 hours which is the fastest for CLC. Their previous record was for Devil and that took 1 month. Then reached 20 Million views in just 4 days wow! That’s impressive for a group that’s not in the big 3 after just 12.5 days from the release of the music video they achieved 30 million views which their previous video that achieved this took 1 year and 3 months and that was for sexy No back in February of 2019.
CLC aren’t know for selling many albums instead quite the opposite ,but they manage to break their own record they achieved 6,391 sales on 1st day of release which is a hefty amount since the just shy above 1K sales for first day for the 8th Ep No.1.
Everglow - LA DI DA
The group's second mini-album, -77.82X-78.29, was released on September 21, 2020, alongside the lead single "La Di Da" and three other songs: "Untouchable", "Gxxd Boy" and "No Good Reason". "La Di Da" was co-written by member E:U. The group's concept photos were released along with their schedule for promotions The group started promoting the lead single "La Di Da" on September 24. They first performed the lead single on Mnet's M Countdown, followed by performances on KBS' Music Bank, MBC's Show! Music Core and SBS' Inkigayo. They broke their first week sales with their album selling more than 25,000 copies.
Lovelyz - Obliviate
Lovelyz released their seventh EP Unforgettable on September 1, along with the lead single "Obliviate". The group got their first win for "Obliviate" on the September 8 episode of SBS MTV's The Show
Fromis_9 - feel good
I have mentioned this group few times before. The group released their third EP My Little Society on September 16, 2020. This features the title track "Feel Good". On September 10, Off The Record confirmed that Lee Seo-yeon would sit out of all promotions for this comeback due to a recent leg injury, and the group will promote as 8. The EP reached no. 3 on the Gaon Album Chart.
Cignature - Arisong
I have introduced this group before, so won't repeat again . On September 23, 2020, the demand for the EP exceeded demand forecast calculated by J9 Entertainment, and the first batch sold out, with the new batch getting delivered by October 5, because of the overlapping Korean Thanksgiving Day. The music video for "Arisong" has reached 3 million views within two days of its release. The song has also has been reviewed by former kpop girl group Nine Muses leader Ryu Sera on her channel, who called it "adorable and cute". Listen and Speak reached no. 21 on the Gaon Album Chart.
LunarSolar - Oh Ya Ya Ya
This is a brand new girl group, so I will introduce them briefly here. LunarSolar is a vocal-based 4 member kpop girl group under J Planet Entertainment. They debuted in September 2, 2020 with the single album "SOLAR : flare", and Oh Ya Ya Ya is their title track.
