Its not a drama without...

 melomane:

Bloody lips and/or bloody noses

Yes, indeed! There is a very strange disease, I never heard that the noses began to bleed from fatigue.

O.o

Mainly going off C-dramas but...

Blood spurting from an injured and/or sick character's mouth.

You just know it's true love when someone puts antiseptic on a cut then they blow to take away the sting.

Tha male lead crying

A scene where the female lead shouts the male lead's name.

Someone saying: Let me tell you or My ass

The latter being said mostly in bl dramas lol

First, they meet as kids (one them either gets saved by the other or gets traumatized) they then meet again as adults and fall in love

100 gangsters attacking the protagonist ... but hit the ML one by one. Oh, and fortunately for our hero, none of them, however evil they may be, has a weapon.