The Hedegehogs (ヘッジホッグス) are a popular band that both Yuu Haruna and Koyuki Hinashi are fans of. Sometime during the manga, the band decided to disband upon Tama losing her voice.
Later, they pass on their inspirations to the Fallen Moon, letting them use their former studio for practice.
- Reika Tama - Vocalist
- Musashi Nicholsen Oda - Bassist
- Nobuaki Yahagi - Drummer
- Tomomi Yoshino - Keyboard
- Hisashi Iwami - Guitarist
- Climbers' High! - Opening theme for the anime adaptation
- Hoshi no Furu Machi - Insert song