A sleek dance-pop number from Twice's 2018 Japanese single, "Stay by My Side" showcased the group's continued evolution in the J-pop market. The single also included the Japanese original "Breakthrough".
- "Stay by My Side" was released as a CD single on October 22, 2018, by WM Japan.
- The single reached number 12 on Oricon's daily singles chart.
- The B-side "Breakthrough" would later be re-recorded in Korean and included on Twice's 2019 EP Feel Special.
Twice is a South Korean girl group formed by JYP Entertainment, best known for their catchy dance-pop anthems and vibrant concepts. "Stay by My Side" was released in the middle of their prolific 2018 schedule, which included multiple Korean and Japanese releases.
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