Boku ga Mitakatta Aozora to release the second single! The title song is performed by Aozora Gumi. The limited edition includes a Blu-ray disc featuring recording footage and the debut day of Boku ga Mitakatta Aozora, behind-the-scenes footage of TikTok Live and more. Also includes a clear trading card (C) randomly selected from 25 kinds, and an application card (valid only in Japan).