ZEROBASEONE is entering a new chapter after two-and-a-half years, but instead of a unified next step, the group is splitting into two competing teams — setting up an unusual “in-house rivalry” in the K-pop market. Following their encore concert, the nine-member project group has effectively come to an end. Five members — Sung Han-bin, Kim Ji-woong, Seok Matthew, Kim Tae-rae and Park Gun-wook — will continue activities under the ZEROBASEONE name. Meanwhile, four members — Zhang Hao, Ricky, Kim Gyu-vin and Han Yu-jin — have returned to their original agencies and are preparing to re-debut as a new boy group, tentatively known as "NDouble." The development has left fans reeling, with confusion mounting after news that both teams are expected to launch activities around the same time in May. Members who once stood on the same stage are now poised to compete directly in the same market within months — a rare scenario even in the fast-moving K-pop industry. Simultaneous promotions by two groups originating from the same project team are highly unusual. While members of disbanded