Ren's Manga

This is about a boy who was born into a cannibal family. They had found his family, but his parents were hanged and his two siblings were experimented on. As for him, he lived comfortably until he was 17. His eyes turned yellow and he was a "monster" to be experimented on. His mother was worried and tried to find him to escape to the beginning of the world, the "Abyss, where everything ends". He makes it to the Abyss and is now in a different world. Where is he? Is he safe? What will happen...