I Transmigrated as a Side Character in BL Fantasy Novel

Genesis is a normal 19- year- old adult who just being one of the famous writer for the novels of many genre. This time, he had published his First BL novel with fantasy world with fantasy setting. Genesis secretly have read many Romance type novel of other writer from GL to BL. Though he proclaim himself as 100% straight in front of other people. He died after publishing his half completed Novel before completing it and editing. There was no truck. There was no car accident. No deadly disease. Genesis transmigrated to the world of the book he had published before his death. Unfortunately, a BL fantasy novel apocalypse based. The worst, he transmigrated as an insignificant side character! Genesis became Genesis Dambera, who is one of twin child of lowly baron. You can enjoy nobility and happiness, right? Unfortunately, Genesis Dambera followed the path of an adventure! Yes, Genesis Dambera is an adventurer! To make the irony of his situation worse, this side character had a worse fate than the villain. What an injustice! As the knowledge of the plot of this world, Genesis Dambera intends to gain favour of powerful people and gain strength for himself as well through his system. So, what if has power of lowest level summoner and priest? Ehhh? Is the MC making a honey trap for me? Is ML no longer a possessive demon, but a tsundere that is following me? Is the fallen archangel a shameless voyeur who spies on me even in the bath? A guardian knight who thinks I'm the reincarnation of previous divine summoner? Baron father who want to set him up with the crown prince? Stay away from me, I just want to survive in this damn world? Why is the apocalypse more strong than it should be? No matter, how much support of other people I have! A nobleman should have rich and independent life. Note: 1. R 18 2. Chapter auxiliary chapter. with the important character of the novel so far. 3. Only one love interest. [TW: Gore, Blood, Violence, Strong language]