Phagocytosis from Cells

Newbie, new opening, weak introduction! Rebirth in another world, fight to the death, subvert the world, just to return! What is your understanding of the world? What is your understanding of the universe? What is your understanding of the mysteries of the human body? I invite you here to appreciate my post-hypothetical world view! It's a single heroine, no harem, and the writing is not good, but please forgive me, it's a new book by a newcomer, and I hope you support it! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.