Heavens, I Have Become the Grandpa Who Delivers Treasures.

The door of my house has undergone magical changes, and people from other worlds come from time to time. Fortunately, these people are suppressed by the rules. Under these rules, no matter what, they are invincible. With the awakening of the system, I gradually became the good news to the losers in the world. "This boss is something I can't describe in words!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.