Made My Night

In June 2026, Blizzard Entertainment announced that Le Sserafim would perform at BlizzCon 2026 as the closing main-stage act.^[1] On August 28, 2026, Source Music announced that Le Sserafim would release their second single album Made My Night on September 11, 2026, posting a teaser video featuring a snippet of the title track, with the lyric "You just made my night".^[2][3] The promotion timetable was posted the same day.^[4] A teaser video titled "The MMN Show" was released on August 29, featuring Huh Yunjin interviewing the other members of Le Sserafim in a parody talk show.^[5] Concept photos for the "Our Delusion" CD single version were released on August 31,^[6] and the track samplers were released on September 1.^[7] The same day, it was announced by Blizzard that the music video for "Made My Night" would be part of Le Sserafim's new collaboration with Overwatch, released ahead of their BlizzCon performance. This marks the group's third collaboration with the game, after "Perfect Night" in 2023 and "So Cynical (Badum)" in 2025.^[8]

The "Chemical Night" version concept photos were released on September 2,^[9] and the "Digital Sync" compact version concept photos were released on September 3.^[10] More teaser videos and photos titled "Far from typical..." and "Pieces of that night" were released on September 3 and 4, respectively, and the group posted a Dance Dance Revolution-style video on September 6 showcasing the choreography for "Made My Night".^[11] The track listing and highlight medley for the single album were released on September 7,^[12] and the music video teaser for the title track was released on September 8.^[13] The music video for "Made My Night" was pre-released at 00:00 Korean Standard Time (UTC+9) on September 11,^[14] and the single album was released later that day alongside the performance film for the title track.^[15]

"Made My Night" was written by Riley McDonough, Connor McDonough, Ryan Daly, Castle, Mae Muller, Justin Tranter and Brandon Colbein, and produced by the former three.^[16] It is an upbeat dance-pop song about the joy experienced when "falling in love and dancing with someone special", and the B-side "AEIOU" is a house song with an addictive melody about fearlessly jumping into love "without hiding ones feelings for someone".^[17][18]