Explain how this plan makes sense.

>Summary: Hiroki is a high school student who is well liked and chubby. After his cute cousin Tsukino is dumped by her ex-boyfriend, Hiroki decides, "I'll become a beautiful woman and make him fall in love with me, and then dump him!" He recruits friends and allies to help him go on a diet and transform into a femme fatale and avenge his cousin.

https://www.animenewsnetwork.com/news/2025-06-12/light-novel-anime-project-announced-adapting-4-original-stories-from-popular-light-novelists/.225494