Ecchi na Mirai no Dannasama

"P-please...you can't touch me like that." "But you like this, don't you, Mirai?" "But I'm not Mirai!" Sakurako, who lives in the Meiji era, travels through time to the current era because of an accident, and finds herself in a girl's body named Mirai. Mirai has a boyfriend named Souma, who looks very much like Sakurako's fiance. Souma always desires her body, and makes her body hot.

(Source: Mobile Media Research)