An Otherworldly Invasion Awakened My Hero-Raising System

[Lighthearted] + [Funny] + [Special Ability System] + [Transmigrate to Another World] + [No Goody-Two-Shoes] + [Lots of Girls]

Lin Jun returns to his high school days and discovers that Blue Star is under invasion from another world. After awakening a System, he gains the power to protect his family. But after one mission, he unexpectedly launches a counter-invasion into the other world. Now there, Lin Jun decides to level up to the max first.