Otometeki Koi Kakumei Love Revo! Portable

Hitomi Sakuragawa was a genuinely beautiful child who won beauty contests. Years of accepting junk food from fans have brought her to 100 kilograms as she enters her second year of high school. When she and her brother move into their father's large dormitory at the start of the new year, she discovers it is already occupied by the school's most popular boys — and their reactions are enough to finally motivate a serious diet.