One Punch: Thank You for Taking Care of My Little Brother

There was an opportunity in front of me, but I didn't cherish it. The system asked me to choose a character, and I sneezed, and Saitama turned into a Vest Master. No matter, I start with a vest, as long as I maximize the power of the vest, Saitama is nothing! Boros will run back to the moon when he sees me, Hungry Wolf desperately wants to be my little brother, and Tornado is my little fangirl. My little brother is taken care of by you. The vest is justice. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.