AND2BLE didn't arrive quietly. Four of its five members – ZHANG HAO, RICKY, KIM GYUVIN, and HAN YUJIN – spent nearly three years as part of ZEROBASEONE, the nine-member group formed through Mnet's Boys Planet in 2023 that became one of fourth-generation K-pop's defining acts. Three days after ZB1's farewell concert at KSPO Dome, their agency YH Entertainment confirmed the four would debut together in a new group. The fifth member, YOO SEUNGEON, came from a different path – a fellow Boys Planet trainee who had initially debuted with EVNNE before departing in late 2025.

Sequence 01: Curiosity, released May 26, is AND2BLE's debut mini-album. The title track "Curious" sets the tone – built around whisper-like vocals and choreography they call the "Whisper Dance." The lyrics get to the heart of the matter: "원점 너머" ("beyond square one") and "함께 그려왔던 brand new" ("it's our dream, and it's brand new") are not subtle messages to embed within a title track, given their background. The group name itself carries a layered logic – AND plus DOUBLE, about expanding identity beyond a single image, showing more than one side at once.

AND2BLE have thought carefully about what this moment means. For GYUVIN, debuting at this stage means one thing: responsibility. He also recalls a moment during the music video shoot where YUJIN told them: "We are family now. If we want to dream higher, we have to be together as a family." SEUNGEON, the member navigating an existing group dynamic from the outside, credits their shared training history for getting them there quickly – honest feedback, he says, is one of their greatest strengths as a team. RICKY is reflective about what came before: "The past few years were a gift for us. We plan to use those experiences to have a strong new start and show different sides of ourselves." 

ZHANG HAO, the group's leader, calls Sequence 01: Curiosity the first page – and he's already thinking about what comes after it. "I hope that we'll continue to grow and become a team that can showcase AND2BLE's unique colour and teamwork even more clearly and confidently than we do now."

The album closes on the words "happy and forever." For YUJIN, forever is simple: the accumulation of memories, past and future, made together. AND2BLE are just starting to make them.