Mephisto is a scientist and he do bad stuff and he has a partner that doesn't want to do a evil stuff and he try to pretend that he's blind and wear glasses to test he's loyalty and until he keep going his fake situation he started to like him and he stop do evil stop and started to do nice stuff..and until the two of them got closer and mephisto confess his situation that it just fake and he confess he's feeling's..there both guy..