Let's Work Out!

‘Minwoo hyung’, whose complex is that there are no muscles in the body, registers at a men-only gym. If I follow this gym's unique ‘special program ’, I will try to get used to developing Minwoo hyung's back hole, which I believe will build muscles like the trainers. **Original Webtoon:** [Ridibooks](https://ridibooks.com/books/5290000067), [Bomtoon](https://www.bomtoon.com/detail/Let_s_do_workout)