The goddess granted my wish.
My family now lives in this world; with my father now by our side. Of course, their memories are now replaced with memories of them being born and raised in this world.
I asked the goddess if the people who knew me from my past world still remember me and she told me she erased every existence that I and my family had in that world. It was also the same to those people who stayed here.
Klein and Yomi already married and now have two children. Both of them own the inn. Klein is already working as the head of the knights protecting the tower and of course, the village, and would help other villages, too.
Sai still remained to live in his house outside the wall. Since the world is now peaceful, he decided to be the world's travelling doctor. He even has a part time job of being children's teacher.
The goddess now stays with Ophelia. Because the white book was destroyed, Ophelia could no longer return. Now, she is claimed as the second goddess of this book. Both of them are happy because all they wanted was being happy in each other's company.
As for Dionne? Well... she is happy. She won't stop singing, but she is always with me. The goddess gave us the power to teleport to the tower whenever we want to visit Dionne. Although Dionne couldn't speak to us directly because she's singing, we know that she can hear and understand us.
I learned a lot of things from this world. I just knew them for only a short span of time, but they were already marked as important people in my life. I learned how to fight not only for myself, but for others. I learned how to exceed my usual efforts. I learned how to understand how other people felt. I learned how to listen and understand their thoughts. Now that I live in this world, I will make my life count.
We will take care of the life this world provides.