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http://www.mangago.me/read-manga/tsumi_to_kuchizuke/mf/v01/c006/
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http://www.mangago.me/read-manga/tsumi_to_kuchizuke/mf/v01/c006/
Someone found it
There is a guy who is training to become a model. The seme is the manger or owner and he trains him how to walk and stuff. Its like a master and slave relationship. He also has to practice walking in just black under wear.