BOYS24 is a 2016 reality boy group unit survival show. It is a large-scale project in which the units of a selected number of members will be produced from a pool of 49 free-agents. 28 trainees, instead of the planned 24, were selected as Boys24 members and were divided into four sub-units who held concerts three to five days a week in rotation for a year. After the 1st Semi-Final, Unit Black debuted as a promotional unit for three months. The final eight winners debuted together on October 26, 2017 as IN2IT.

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