By some strange turn of fate, my soul travelled to another world when I died due to my stupid bravado. (I know, cliché, right?) I woke up as the youngest son of a duke, who had passed out after seeing his erect dick for the first time. However, although this world is pretty much like any other generic fantasy isekai, there's a catch. For the people here, fat means beautiful, at least when talking about girls. Indeed, they like fat, greasy girls, with huge noses and puffed up lips. So, what am I to do when I see slim, gorgeous girls being bullied and shunned by society? I save them, of course! I just didn't expect them all to fall in love with me and be completely fine with sharing me!