"Once & Forever" (เก็บไว้ตลอดไป) is the first special single by Billkin. It was released on October 7, 2021.
The single was made in collaboration with Oppo, with the song also promoting their phone series Reno6.
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"Once & Forever" (เก็บไว้ตลอดไป) is the first special single by Billkin. It was released on October 7, 2021.
The single was made in collaboration with Oppo, with the song also promoting their phone series Reno6.