Background and release
Riizing
On March 5, 2024, SM Entertainment announced that Riize would kick off their Riizing Day Fan-Con Tour in May 2024 and release a mini-album in the second quarter of the year. On April 3, 2024, Riize posted a "Real-time Oddysey" schedule poster revealing the release date of their first EP Riizing, pre-release singles, album promotions and further activities. On April 3 and 18, the group released the tracks "Siren" and "Impossible" as pre-release digital singles, accompanied by music videos. On April 29, Riize released three more tracks on streaming services: "Honestly", "9 Days" and "One Kiss". On June 4, 2024, the group released a remix version of "Impossible" produced by French DJ Darius. The EP was officially released on June 17, 2024, along with the lead single "Boom Boom Bass" and its music video.
Riizing: Epilogue
On September 2, 2024, SM announced that Riize would be releasing their first repackage EP Riizing: Epilogue on September 4, 2024, along with its lead single "Combo". This date also marks the group's first debut anniversary.
Composition
The EP Riizing, described as an "emotional-pop album", opens with the title track "Boom Boom Bass", a dance-pop song featuring a "funky disco beat", "groovy bass lines", and lyrics about "youth freely expressing their excitement for each other by playing the bass guitar". The second track, "Siren", incorporates 90's hip-hop elements like "boom bap drums" and "strong bass riffs". The third track, "Impossible", features "rhythmic house beats" and "mysterious synthesizers", with lyrics suggesting that "anything is possible when pursued collectively". The fourth track, "9 Days", is a dance song characterized by "energetic synthesizers and drums", and "infectious melodies", convey that "weeks feel like nine days, but they (Riize) keep pursuing their dreams". The fifth track, "Honestly", is an R&B-pop song combining "dreamy synth pads", "trap drum beats" and "soothing vocals". The sixth track, "One Kiss", is a mid-tempo song featuring "majestic strings" and "powerful drums". The album closes with previously released singles "Talk Saxy" and "Love 119"; "Talk Saxy" features saxophone riffs and 808 bass, while "Love 119" incorporates "sweet piano riffs" and samples "Emergency Room" by South Korean band Izi.