Beerus has always been his grumpy, selfish self. Until he and Whis enter a cafe on earth, finding (y/n). Beerus had no idea, that his life could be changed entirely from this one girl.
Izuku yagi was a boy without a power unlike others around him he was mocked, ridiculed and vestments by his peers. That was when his anger started to build and soon the world will know he is not to be messed with.