Unlock the Mo Dao System, Read All the Collections and Reach the Level Directly

What does it mean to be thrown into a dangerous ruins adventure by the family boss when you are just an adult? What does it mean to not be able to tell whether it is reality or fantasy? You can actually bring a little sister out from the secret realm for adventure? The Mo family boy explores the ruins and unintentionally brings out a tsundere girl, triggering a family revenge war