Kanato is a commoner who retains the memory of his previous life. He has cheat-like abilities, so he hunts monsters in secret to earn money to pay for his beloved little sister’s magic school tuition fees, whom he dotes on greatly. Together, they lead a peaceful, slow-life.
However, his life takes a turn for the worse when he encounters the strongest noble lady in the country and is admitted to the same magic school. He also ends up getting involved with the (big-breasted) princess of the kingdom, cursed by envious noble boys, dotes on by the (big-breasted) queen of an enemy country and witnesses his (big-breasted) little sister awakening.
