The death of the parents was to forced, and doesnt fit with the OP tag. With the OP tag i expect that i dont need to read any tragedies to befall on the MC. If you want to kill the parents with the hands of some random gangsters you shouldnt yse OP tag, but more like Weak to Strong tag

"Demon Lord Bullrock's decision" // "Demon Lord Bullrick's resolve" // "Amon's false pride"

The second line in the first chapter says that he is a transmigator