Onegai Muscle / Macho a Name?

 (お願いマッスル/マッチョアネーム?) is a collaboration single by Fairouz Ai and Ishikawa Kaito. It was released on July 24, 2019, and peaked at #22 on the Oricon single chart.

Single Information
The lead track Onegai Muscle was used as the opening theme for the anime How Heavy Are the Dumbbells You Lift?, while Macho a Name? was used as the ending theme.
 * Catalog Number:
 * ZMCZ-13191
 * Lyrics: Sidechest Karasuya (サイドチェスト烏屋)
 * Composition: Sidechest Karasuya, Six-Pack Shinozaki (シックスパック篠崎)
 * Arrangement: Six-Pack Shinozaki

Tracklist

 * 1) Onegai Muscle (お願いマッスル)
 * 2) Macho a Name? (マッチョアネーム?)
 * 3) Onegai Muscle (instrumental)
 * 4) Macho a Name? (instrumental)

Featured Artists

 * Fairouz Ai as Sakura Hibiki (紗倉ひびき)
 * Ishikawa Kaito as Machio Naruzo (街雄鳴造)