This time I will protect them I won't be a coward

During the final war arc Kaminari Denki gets hit in the head and wakes up in his 14 year old body two months before his UA entrance exam and vows to protect his friends by supporting them as a side character from the side lines but he does not realise that the whole class 1-A has fallen for him and has also become protective of him and heck even the villains are interested in him.