On April 15, Loossemble made their first comeback with the album 'One Of A Kind,' including the title song "Girls' Night."

According to the Hanteo chart, 44,075 copies were sold on the first day, making it their highest-selling album. Their self-titled debut album accumulated around 34,000 first-day sales.

'One Of A Kind' is Loossemble's second mini-album featuring eight tracks: "Intro (A butterfly's signal)," "Girls' Night," "Moonlilght," "Boomerang," "He Said I Said," "Truman Show," "Starlight," and the lead single's instrumental version.