Don't Try to Suck My Blood [Quick Transmigration]

Xi Xi bound herself to a System and transmigrated through various worlds, ridding the hearts of women who had been mistreated and had no power to fight back of their resentment.

"Why did I give so much, yet you never appreciated it, and instead hurt me so badly?"

Xi Xi shrugged. "Because some scumbags simply don't know how to be grateful!"

Theme: People should be grateful.