Our Entire Family Has Secrets [Transmigrated]

Everyone in our family has their own secrets. My mom is the only daughter of a former interstellar pirate, my father is a secret agent of the Old Century Allied Political Army. My adopted older brother has a special bloodline of beastmen, and the sister we picked up from the roadside is actually a master of witchcraft with mystical lineage. And I, an ordinary eighteen-year-old male high school student, the only biological son of my parents, has no special bloodline, and has been a “normal person” since birth The reason why I can know everyone’s secrets is because- I transmigrated. I was originally an ordinary person on the edge of the class, classmates couldn’t even remember my name occ...