Pada 11 Mei, mereka merilis album mini kelima ''Binary Code'', dengan singel utama "Black Mirror".<ref>{{Cite web|url=https://entertain.naver.com/read?oid=109&aid=0004393199|title=원어스, 5월 11일 컴백 확정..새 앨범 'BINARY CODE' 발표 [공식]|website=n.news.naver.com}}</ref>
== Anggota ==
Dikutip dari profil mereka di situs Naver.<ref>{{cite web|url=https://people.search.naver.com/search.naver?where=nexearch&sm=tab_ppn&query=원어스&os=8801019&ie=utf8&key=PeopleService|title=Oneus Naver Profile|publisher=Naver|language=ko|access-date=2021-12-27|archive-date=2021-02-15|archive-url=https://web.archive.org/web/20210215114258/https://people.search.naver.com/search.naver?where=nexearch&sm=tab_ppn&query=%EC%9B%90%EC%96%B4%EC%8A%A4&os=8801019&ie=utf8&key=PeopleService|dead-url=yes}}</ref>