Girl's Day, the reason why "breakup theory" is circulating.

● debut in 2010. In 2017 everyone of the members re-contracted with management office for two years.

● The oldest Sojin's contract expires next month. There is the possibility of re-contracting, but also to continue activities as an actress there is the possibility of contracting with another management office that specialises in acting ● In that case, other members who reached the time of re-contract expiration may not sign again.