My Sister Has No Opponent Ahead of Her

Wang Chen was originally just a standard fat nerd. As a die-hard fan of "Death", he was also a sister-controller without a sister. However, one day, he suddenly found that he had traveled through time! Travel to a different world where the dead are everywhere! And it has a mutation system called "Zanpakuto Forging System"! And most importantly, the function of this system is to forge Zanpakutō for his sisters! ? "My dear Yi Douyou, do you want the strongest ice element Daiguren Hyōrinmaru, or do you want the strongest fire element Ryūren Wakahui?" "Which knife can defeat you?" "These two may not work, but Mirror Flowers and Water Moon may work!" "Then I want a mirror and a moon in the water!" "Ah, this won't work, because I might really die." From now on, my sister will stand at the top! My sister is invincible in front of me! Readership: 926295067, welcome to flirt~Welcome all the big guys who like this book, like Death, and like sisters~