Astrain.
K-Pop
Astrain (アストレイン) is a 3-member Japanese idol group managed by Project S. The lineup includes Usami Sino, Zinguru BE:lle and 89. Additional background says that The group was formed in January 2026 and their first EP, Chapter 1: No EXIT, was released digitally on March 5, 2026. The profile also notes that they made their live debut on on March 22, 2026.
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