Sources:
- https://www.instagram.com/p/CE6QAr2DbIw/ | https://redd.it/ipcl60 - 09/09/2020 [200909]
- CLC - OSEN V Channel “Practice Room Challenge” - 02/09/2020 [200902]
- https://twitter.com/kep1er_jp/status/1615635174771019778 | https://redd.it/10f2t7u - 18/01/2023 [230118]
- https://twitter.com/official_kep1er/status/1616079826854744064 | https://redd.it/10g3l9a - 19/01/2023[230119]