How Could a Reincarnated Villainous Young Master Turn into a Beautiful Girl?

After dying, he is reincarnated by a god as a villainous young master named Bell. He regains his memories while being executed and is reborn at the moment he confesses to the princess and gets rejected.

All right, a new life. This time, I'll become strong and live a peaceful life.

But why is the princess clinging to me? I apologized properly, didn't I?

Whoa, don't bring the Haughty Heroine along with you!

And why does getting stronger turn me into a girl?

Wait, why is the Haughty Heroine looking at me so strangely?

I just want to live a peaceful life, dammit!