KO One: I Smash Through the KO Rankings with a Ruler from the Start

Huangfu Yixin transmigrates to the world of KO One, becoming Wang D-Dong's neighbor and Chinese teacher. He seems gentle and refined, but secretly wields the power of Death. One swing of his ruler, and all beings are equal. Wang D-Dong: “Brother Yixin! Don't come any closer...” Huangfu Yixin (smiling): “Your teacher will be gentle...” Wang Arthur (with both hands swollen from beatings): “Teacher, your teaching methods are... quite distinctive.” Rex (pinned to the wall by Six Rods of Light): “I was wrong! I really was!” Black Dragon (bruised and battered): “Trouble! Let's get out of here!” Tian Xin (blushing): “Yixin, the way you teach problems... you're even cooler than when you fight.” And when he is forced to enter the space-time battlefield and face the Demon Lord Diabolo... Senbonzakura scatters, “You call this a Battle Power Index?” “No, this is Bankai.” You know, Lord of the Spirit World? (Female lead: Tian Xin. Whether she's the only one is another matter... I'll write whatever comes to me...)