After transmigrating into a crossover world, Yuya becomes the Yukinoshita family's seven-year-old adopted son.
From the start, he awakens the more children, more blessings System, but stares at his tiny hands in thought: Is this useless System just going to sit around for fifteen years?
Then, in a daze, his older sister Haruno calls him "Dad," and the System immediately counts it as a success, rewarding him with max-level cooking skills! Yuya gets it now: this System is a huge bug that only cares about what people call him!
To max out his stats and become invincible, he starts laying traps for all sorts of people at Teitan Elementary School.
When a bully snatches Yukino's shoes and flaunts them, Yuya crushes him at lightning speed with an arithmetic problem meant for older students, then uses his max-level swordsmanship to pin the boy down and grind him into the dirt. The whole class is stunned as the bully cries and calls him "Dad" over and over in front of everyone. Yuya immediately unleashes another burst of max-level swordsmanship, then kneels on one knee and gently puts Yukino's shoes back on. Eri is left completely dumbfounded!
Whoever you are, do me a favor and call me "Dad"!
