Fact1: Bianca is neighbor and former childhood friend of Wesley, Fact2: party turns out to be disaster, Fact3: social group is popular and more accessible than others in group, Fact4: students in high school are interested as way to get to Jess and Casey, Fact5: Jess post it online leading to entire school mocking her
Output: Bianca is enjoying her senior year of high school in the suburbs of Atlanta with her two best friends, Jess and Casey, both of whom are significantly more popular than she is. She is also the neighbor and former childhood friend of Wesley, a star on the schools football team, with whom she had fallen out during high school. She has a crush on guitarplaying Toby, and reluctantly attends a party hosted by meangirl Madison, hoping to talk to him. The party turns out to be a disaster for her, as its there that Wesley unthinkingly reveals to her that she is the DUFF of her friend group, the Designated Ugly Fat Friend. The DUFF does not actually have to be ugly or fat, he explains, its just the person in a social group who is less popular and more accessible than the others in the group. People exploit the DUFF to get to the popular people. Bianca is insulted and devastated, but she soon realizes Wesley is right. The students in her high school are only interested in her as a way to get to Jess and Casey. She takes her anger out on Jess and Casey and unfriends them on social media and in person. Bianca later overhears Wesleys science teacher Mr. Fillmore telling Wesley that unless he passes the midterm, hes off the football team, which could cost him his football scholarship. Desperate to change her social standing and go on a date with Toby, Bianca strikes a deal with Wesley—shell help him pass science if hell advise her how to stop being a DUFF. They have a fun time at a mall, attempting a makeover by buying new clothes. This backfires when Madisons minion records Bianca playing around in her new clothes and pretending that a mannequin is Toby. They create a video ridiculing Bianca and post it online leading to the entire school mocking her. It also becomes clear that Madison a realityTV wannabe feels possessive of Wesley, her onagain offagain boyfriend, and is jealous of Biancas relationship with him. Wesley tells Bianca not to let the video destroy her. Instead, he suggests she own it and just be upfront with Toby by talking directly to him and asking him out. When Bianca sees Toby at school, she does ask him, and to her surprise he accepts. When Wesley becomes frustrated by the constant arguing between his parents, Bianca takes him to her favorite spot in the forest, her think rock, to help him cope with a possible divorce. They kiss, but joke about it and pretend it didnt mean anything. At Bianca and Tobys date at his house, she finds herself thinking about Wesley, but tries to brush it off. She ultimately discovers that Toby is Duffing her—spending time with her in order to connect with Jess and Casey. She confronts Toby, finally seeing him for the shallow and superficial jerk he is, and leaves in tears. Seeking Wesley to talk with him about the date, she finds him at the thinking rock kissing Madison. Angry with Toby and Wesley, she reunites with Jess and Casey who were genuine friends all along. They, along with her understanding mother Dottie, convince her to go to the homecoming dance with them, in an outfit they create together that incorporates elements of Biancas previous wardrobe such as her flannel shirts. At the dance, Bianca tells off Madison, saying essentially that we are all DUFFs who should be true to our own identities and her bullying was just a reflection of her own insecurities about herself. Madison is crowned homecoming queen and Wesley is crowned king, but he rejects Madison and the title and kisses Bianca in front of the whole school. In the end, Biancas article about homecoming is a hit with the students; Bianca is going to attend Northwestern University while Wesley goes to Ohio State. In the end Bianca and Wesley are still together.