Practical Teaching Beginning Kusuo Saiki Template

Traveling through a strength-supremacist classroom, I originally thought it would be an ordinary time travel, but suddenly Ishiro received the system on his 18th birthday and was given the Saiki Kusuo template. He heard that his fiancée is called Itanyanagi. How will the protagonist act in this world and strive to be promoted to Class A? Please don't scold Xiaobai when he's practicing his skills. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.