They feature the song “Onegai Muscle” by Ai Fairouz & Kaito Ishikawa and the closing song “Macho Anemu” by Kaito Ishikawa.
The anime adaptation of the manga series How much heavy dumbbells can you lift? got underway on July 3rd, 2019 and Funimation is handling the simulcast for it.
The original manga comes from Yabako Sandrovich and MAAM has seven volumes out since it began back in 2016 on the Ura Sunday manga site.
Funimation will also be doing a simuldub for it with that now scheduled for a July 17th, 2019 debut.
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How Heavy Are the Dumbbells You Lift? - Opening | Onegai Muscle