I Made a Monster Figure in Japan

Yuuki Yu is a time traveler. Now his parents are dead, he has a sister and a house. He likes ACGN and his specialty is making handmade clay dolls. He thought his life would be a Japanese high school student's life full of youthful love stories, until he discovered that the world was full of weirdness and mystery. A strange and absurd door slowly opened in front of him. Yuuki Yu began to discover that the clay dolls he made with his own hands became a weapon to defeat monsters.