Seoul, Korea, Republic of (2017 – present)
OGUOGU (구구단 오구오구) is the first sub-unit from the girlgroup gugudan (구구단, stylized as gu9udan). The duo is composed by gugudan's youngest members, Kang Mina and Cho Hyeyeon, and debuted on August 10, 2017, with the single album ICE CHU.
The unit's name is oguogu because of the numbers that each member represent in gugudan's multiplication table, being Hyeyeon number 5 (o) and Mina 9 (gu).
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