Mikaeshi Bijin: Fukushuu Dieter Iroha

Sena Iroha is a company receptionist with a look, figure, and pheromones that attract men. However, she actually has a dark past where she used to weigh over 100 kilograms and was teased and bullied because of it. Even now, having achieved her beauty through a grueling diet, Iroha still carries the scars of the past, and to make the men who mocked her suffer humiliation, she uses her feminine charm to lure them out one by one and take revenge!!

(Source: Manga Action, translated)