Imperial Coroner (guy ends up protecting the coroner)
Handsome Siblings (this is my favorite. They start off as enemies but then turn into friends protecting each other)
Sleuth of the Ming Dynasty (the detective always needs saving, but he also saves them back after they become friends)
Guardian (one of them protects the other one)
My Unicorn Girl (start off as enemies and end up protecting each other)
Renascence (he saves her, but then she loses her memory, then they both try to protect each other)
Under the Power (start off on the wrong foot, but then he starts protecting her)