So, it's a reverse harem comedy about a yaoi (boy love) fan girl who losses a ton of weight after having an anime related melt down that left her sulking in her room for a few days.
Anyways, this is an episode where the main character, Kai, gains the weight back
https://www3.dubhappytv.com/stream/1647 ... glish-dub/
https://www3.gogoanime.se/watashi-ga-mo ... -episode-5
Keep in mind, her fat form is very cartoonish. However, what I like about this episode is how one of her love interests responds to the change.
Shima, a rich bisexual girl who does drag cosplay. Anyways, she likes Kai for her personality, even when she was a fat nerd, but clearly has a fat fetish that was highlighted in this episode