早於2002年組成樂隊，ONE PROMISE四子一同在音樂路上堅持至今。ONE PROMISE以「認真」一詞來形容自己的音樂，他們致力在每一首作品研究新的聲音， 例如錄音時特意試錄很多不同的層次，在震撼觀眾的同時，也能擦出不同的新火花。 由2019年加盟香港環球唱片的首支單曲《壹步》，到2020年的《明年見》，ONE PROMISE每年都以搖滾音樂在廣東流行歌榜留名。 不幸地，鼓手Anton在2020年罹患骨枯症。因為隊員間的不離不棄，Anton於2022年由鼓手轉型為rapper，ONE PROMISE也轉型為Pop/Rap Band，當中的手足情誼不言而喻。 They first came together as a band back in 2002. Since then, the four boys in ONE PROMISE are together as one on their music journey. ONE PROMISE would say their music is rather “serious”. They would take time to work out the new and perfect sound for each song. A good example is the multiple layers of recordings they would specially do every time to give a whole new wow effect for the audience to enjoy. Since signing up with Universal Music in 2019 to release their debut single《ONE Step》.《Unfinished》(See You Next Year) was later released in 2020. ONE PROMISE has certainly left their mark on the rock Cantopop history each year. Unfortunately, Anton the drummer was diagnosed with osteonecrosis in 2020. The boys vowed to stick together and never give up. Anton is turned from a drummer into a rapper in 2022. ONE PROMISE now becomes a Pop/Rap Band. Such great brotherhood among the boys just goes without saying!