インナーマッスルでしょう
innāmassurudeshō
1. Probably inner muscles.
Noun
#83977
1. Probably inner muscles.
1. it seems; I think
2. right?; don't you agree?
1. Clean; Tidy
1. Forceful; Aggressive
1. In-hospital; Within the hospital
1. inner
2. underwear; undergarment
1. inner muscles
1. muscle; strength
1. inner space
1. bridal undergarments