Da Capo (EP)

Initially, April was set to make a comeback in March 2020 but on March 11, DSP Media announced that the group would postpone their comeback to April 2020 amid the coronavirus concerns.[1] On April 10, a poster teasing the group's comeback was posted which revealed the mini album's title "Da Capo" and the release date, April 22. According to DSP Media, the album's title "Da Capo" is a musical term which means "from the beginning".[2] On April 11, a story film was released, hinting at a sci-fi themed, a surprisingly darker concept compared to April's previous releases. The mini album's title track was revealed to be "Lalalilala". Subsequently, each member's individual teaser and unit teasers were released from April 12 to 19, with the tracklist being revealed on April 16. A music video teaser was posted on April 21.

Da Capo and the music video for "Lalalilala" were released on April 22.

"Lalilala" was written and composed by Kang Myeong-shin & moonc, both of whom had worked with April on their previous release. It is an upbeat, disco-influenced EDM track with a repetitive hook, and gets less intense during the verses than the chorus, with a middle-eight rap from members Chaewon, Rachel, and Yena. Upon release, many fans compared "Lalalilala" to April's former labelmates Kara's sound, pointing out the song's grand chorus.

The group started promoting "Lalalilala" on April 23, 2020 on Mnet's M Countdown, followed by performances on KBS's Music Bank, MBC's Show! Music Core, and SBS's Inkigayo.

According to Hanteo, Da Capo sold 3,140 copies on its first day of availability, the highest for the group and higher than The Ruby's first day sales of 227.[3] "LALALILALA" was also April's highest-charting song ever on South Korean music sites, reaching number 1 on Bugs, number 6 on Genie, number 13 on Soribada, and number 37 on Melon, with April topping Melon's Female Group Chart.[4][5]

With three days of tracking, Da Capo debuted at number 18 on South Korea's Gaon Album Chart, while "Lalalilala" debuted at number 100 on the Gaon Digital Chart on the chart issue dated April 19–25, 2020, making it their first song to enter the chart since 2017's "April Story". The following week, on the chart issue dated April 26-May 2, 2020, Da Capo rose to number 5 on the Album Chart while "Lalalilala" rose to number 40 on the Digital Chart, both becoming the highest-charting releases of April's career.