Tensei Saki ga Zannen Ouji Datta Ken: Ima wa Fukkin 1-kai mo Dekinai kedo Yasete Isekai Sukuimasu

Synopsis:

After being asked by the goddess to defeat the evil god, a young man who gets into a plane crash while returning from a business trip overseas is reincarnated in another world. However, due to his corpulent and unattractive appearance, he was reincarnated as a stupid prince who is referred to as the "Pig Prince" by the aristocracy. How are you going to defeat the evil god if you can't even do one sit-up? The struggle of the Pig Prince to lose weight is told here!