Izuku Midoriya was a highschool kid. His classmates knew him as the "Nerd" due to his high IQ. However, contrary to what one might think of someone with such a title, he was bullied by a student name Natsume Kengo. Before he got bullied, he had to take care of his mother, Inko had Cancer unfortunately she passed away.
He always stayed away from his classmates until he found someone similar to him. A girl named Wakaba Hiro.
Izuku and Hiro usually talked a lot on a rooftop or somewhere just alone two of them. After they hung out and talked, Izuku confessed to Hiro and surprisingly she accepts.
In a world where the battle between Hero and Demon Lord repeated itself time and time again, an enormous space-time spell misfired and hit a certain high school class, killing everyone in it. However, guided by what seemed to be a miracle, the students were all reincarnated into that other world. While a handful was fortunate enough to become royalty, nobles, and other kinds of influential people, one girl and one boy were not so lucky. Hiro was reborn as a spider monster of the weakest kind in a dungeon filled with vicious beasts, she is forced to experience extreme hardship. Even so, armed with nothing but her human knowledge and overwhelming positivity, she continued to press on and survive against creatures much stronger than herself.
Izuku was not so different from Hiro. He was reborn as a Snake monster of the medium kind in a dungeon filled with vicious monsters. Armed with nothing but his human knowledge and overwhelming positivity, he continued to press on and survive against creatures much stronger than himself. He only had a few objectives to find a way out, evolving into the most powerful Snake and reuniting with his Girlfriend.