My elder sister pretented to be a white moonlight

  summary:

Xie Tang rescued her favourite teenager from the tsunami when she was fifteen. The teenager promised to marry her when she grew up. The proud boy grew up and became a gloomy and hard-hearted general who was only tender to one person. The person to marry is not her. She watched as her sister pretended to be herself and got engaged to him, and she became a vicious woman who wanted to kick in. * Returning to fifteen years old, Xie Tang decided not to save Lu Ri in the tsunami half a year later, let him die by himself! Can one ...