Manga Isekai Desu Ga Mamono Saibai Shiteimasu.

One day, Kedji Himuro hears a knock on the door, and when he opens it, he discovers that he is in a parallel world.
However, his new life is completely useless. Here he has no money, no fighting skills, and even corny cannot cook his own food. Diving into a trash can, he finds seeds, which allows him to come up with a plan to grow his own food. However, his plans will seriously change when he realizes that monsters grow from these seeds.