The CD single including both the OP song performed by Ai Fairouz (Hibiki Sakura) and Kaito Ishikawa (Naruzo Machio) and the ED song by Ishikawa will go on sale on July 24.
The “Onegai Muscle” MV stars 27-year-old “muscle idol”/professional wrestler Reika Saiki and 25-year-old real bodybuilder Naotaka Yokokawa (the winner of the Tokyo Bodybuilding Championship in 2017).