The Virgin Stranded in a Brothel -Forced Into Prostitution-

From Renta:
Tormented by his expert touches, she's soaking wet, even though it's her first time and her innocent body is made into something shamefully erotic. It's Yui's first time with her boyfriend and yet she is unable to bring herself to take that plunge. On one such day, she ends up slipping through time and finds herself in one of the red-light districts in the Edo period!! Before a very confused Yui appears the owner, Safumi, who looks exactly like her boyfriend. "You'll make an excellent prostitute," he says, and she is forced to realize just how different he and her boyfriend really are as he pleasures her against her will. "Will I be forced to become a prostitute?"

Official English