1003 Book(s) Related to merry me now

I used to be an ordinary person — until one day, my younger brother killed someone.
Everyone got down on their knees, begging me to save him. So I took his place and went to prison.
On the day I was released, my fiancée Teresa publicly broke off the engagement: "A convict like you doesn't deserve me!"
My adoptive parents disowned me on the spot and kicked me out: "You're a murderer. We don't care if you live or die!"
I agreed to everything right then and there.
But when they found out who I really was, they regretted it.

I am the leader of the world's largest mercenary group. After retiring, I went to work as a bodyguard at the home of the woman who saved my life.
I hid my identity, wanting only to protect the woman who had saved me — until one day, her family fell into crisis. Everyone came to bully her, take everything she had, and even force her out onto the streets.
I stopped hiding and stepped forward. Anyone who dares to harm her will pay the price!

Three years ago, I gave up everything and went to prison in my younger brother's place. After getting out, they humiliated me and even made me sleep in the storage room. Everyone mocked me as a murderer, called me trash. My fiancée's parents also looked down on me.
But they didn't know that during those three years in prison, with the help of a mysterious old man, I had already awakened as an alpha werewolf...