I like junk food, so similarly I also like reading trash wish fulfillment manga written by authors who've clearly never interacted socially with another person let alone the opposite sex.
That being said, shouldn't this guy be famous for, I dunno, getting stabbed and hospitalized for saving the two sisters? Even if it wasn't the girls, he still should've gotten some notice or increase in conspicuousness because what he was involved in would've been on the news.