Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 231

The previous life is nothing but a joke. Being used completely then abandoned mercilessly. How can I be this stupid to not even notice such an obvious scam? Fortunately, I can have a second chance with my rebirth. Sister, Brother Yi and whoever mistreated me in my previous life, are you ready for my revenge and the counterattack of a princess?

His fiancée, whom he had never met, had just broken off their engagement. He's then betrayed by his girlfriend and schemed against by her lover.His mother's legacy awakens him. No longer content with mediocrity, he transforms into a dragon overnight.

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates

Xie Shu’s pursuit of Su Qianyi for ten years, never giving up, but at the end of his life, he still didn’t receive a response from her.He felt that he had lived a very unsuccessful life. In the last moment before closing his eyes, there was still someone unexpected who was devastated by his departure.At that time, he thought, if he could choose again, he would definitely not love Su Qianyi anymore.Opening his eyes again, he returned to his school days, giving him a second chance. This time, Xie Shu clearly recognized his own heart and began to maintain a relationship with Su Qianyi…