Here is a good example of a way to convince me to double. However, the only thing I don't like is our characters have the same roles (teacherxstudent). I'd rather the pairings be a little different like teacherxstudent and studentxstudent. Otherwise the storyline becomes repetitive and less original. There's a few different ways we can do this plot.
Araya and (enter your character here) are college roommates that have auditoned for a play that is being produced by a big time company. The play, centers around the arranged marriage of a prince and a princess from a different nation. During the course of the engagement, the princess is sent, along with her maid, to live in the castle with the prince. However, instead of falling in love with the princess, like what is expected of the prince, he finds interest in the maid. The princess, however, is not left alone, because the knight, who is the princes best friend, finds himself falling quickly in love with her. The role of the princess will be played by your female character, the maid by (your character). Little do the girls know, the role of the prince and the knight will be played by none other than their professors. Throughout the play, the couples will pretend to fall in love on stage, however, what happens if they really don't have to pretend after a while?