Time of Eve

Revolving around Android-Human relationships Nagi sets Rikuo and Misaki up with the couple Koji and Rina who are regulars in the cafe. They assume one is human and treat it as an Android-Human relationship, however as the conversation progresses a bust up between Koji and Rina occurs, Rikuo and Misaki split to console each one of them, discovering them to each be Androids engaged in a relationship, of which both Koji and Rina are unaware and assume the other to be Human. (Source: Wikipedia)