KOYA's invested in knowledge. The details of every little thing in the world fascinates KOYA, including the vast mystery of space, how to attentively listen to friends... frequently losing the track of time. And today, it was the physics surrounding a shooting star, and why they fall out of the sky. If you have an exam ahead of you, great. KOYA is here to stay up with you all night. Just lend us your ears. 👂 #KOYA #STUDYWITHME #STUDY #ASMR #BT21 ❗️#BT21 Official ​Twitter : https://twitter.com/BT21_ Instagram : https://www.instagram.com/BT21_official/ Facebook : https://www.facebook.com/BT21.Official/ LINE : mobile📱 add @BT21_JP @BT21_USA @BT21_HK @BT21_TW @BT21_TH @BT21_KR