B SIDE (비사이드 bisaideu) is a MUPLY (formerly Mu:fully) reality webseries in 3 episodes. The series followed Stray Kids in their daily life while showing behind the scenes for the release of Mixtape : Gone Days.
Episodes[]
| # | Thumbnail | Title | Air Date | Link |
|---|---|---|---|---|
| 1 | 
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Unveiling new tracks of Stray Kids (JYP 사옥에서 디스곡 써버림🔥) |
Dec. 17, 2019 | 
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| 2 | 
|
We made Stray Kids STRAY (내가 꼰대라니..!! 이제 스무살인데 결과 실화?) |
Dec. 24, 2019 |
|
| 3 | 
|
We promised to give Stray Kids REAL MONEY for the number of views‼ (조회수 만큼 현찰을 쏘는 FLEX 들어봤어?! 💸) |
Dec. 31, 2019 |
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MUPLY's Pick[]
Unreleased cuts from the three episodes.
| # | Thumbnail | Title | Air Date | Link |
|---|---|---|---|---|
| 1 | 
|
Unreleased Cut.zip (🤙모두 싸우지 마시고 힙합 하세요 !!🤙) |
Dec. 20, 2019 |
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| 2 | 
|
Stray Kids' Daily Vlog (스트레이 키즈 일상(?) 브이로그) |
Dec. 27, 2019 |
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| 3 | 
|
Felix tried ASMR (그는 ASMR 꿈나무입니다) |
Dec. 27, 2019 |
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| 4 | 
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Eat Well. Play Well (아직도(?) 끝나지 않은 이야기) |
Jan. 3, 2020 |
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Song spoilers[]
Besides "Mixtape : Gone Days", other unreleased songs were spoiled during the first episode. They were all released by 2021:
- "Streetlight" (released in 2020)
- "Another Day" (released in 2020)
- "Maknae On Top" (released in 2021)
- "Piece of a Puzzle" (released in 2021)
- "Up All Night" (released in 2021)