you are correct, now he just isnt fat in this adaptation i would say that our mc is somewhat built , dude got muscle in this adaptation thats it being fat never was the main charecteristic of the mc i think unless they really enphasized in the novel and on all moment of sexual act again i only read the chapter 67 till that part to checkif that was true so who knows, then i dont think anybody lost anything in reality we gained since instead of a fat cunt that moves all the fat while banging , we got a giga chad mc in phisique kinda.and too nobody would read a manga unless for guilty pleasure that is a glorified ugly bastard hentai.