Love in One's Lifetime

My boyfriend cheated on me with my best friend, but the funny thing is that the matchmaker was me. Looking at everything in front of me, I was so sick that I wanted to vomit. I obeyed him in every possible way, but he was ruthless and unjust to me. In this case, I will retaliate in kind. If you attack my best friend, I will go find your brother! But who should I look for...