Mill, a member OnlyOneOf, will rejoin the boy band, the group’s agency 8D Entertainment announced Wednesday with a handwritten apology letter written by the artist posted online.

In November, the agency announced that Mill would be temporarily suspended from the group and its activities as a punishment for “violating a rule of the group,” though the agency did not clarify what that rule was.

8D Entertainment added that OnlyOneOf is working very hard to release a new album early next year.

The group, which debuted last May with “Dot Point Jump,” is composed of seven members, KB, Love, Rie, Yoojung, Junji, Mill and Nine.

BY YIM SEUNG-HYE [yim.seunghye@joongang.co.kr]