Toaru Majutsu no Index: New Testament - Volume 15, Prologue: The Reverse Reverse Side of the Coin — Rock_on_Right_Arm.

Do you want to know What happens if a cultured man gets a chance to try his hidden Degenerate and taboo thoughts in real life?Yang Chen, Our Main character, gets this chance. Yang Chen grew up with an obsessive love for older women, and all of his wishes came true when Ambulance-kun sent him into the cycle of reincarnation.He reincarnates in Seraphia, a parallel world of Earth. Several hundred years ago, Abyssal trials descended on this world. people were given role-playing missions after being dragged into the underworld.Yang Chen Awakens the Primordial perverted system and System is a fallen angel and an overpowered milf.With her help, He did many perverted things with the roles assigned to him.Yang Chen did taboo sins and conquered milfs as a Village chief, Principal, Masseur, Doctor, Teacher, etc...When He was done with ghost humans, Yang Chen's claws reached out to other races, such as vampires, Succubus, Zombies, foxes, etc...

Qi Le – gender: male, sexual interest: women – suffered from congenital heart disease and died early. However, God played a small trick on him and placed his soul inside the body of a trashy shou.

A filthy, idiotic, hypocritical alcoholic degenerate, known to most as Ricky Freeman, died in a tragic car accident when his lower half was crushed by a drunk driver. Coughing out a bloody mourning for his balls, Ricky finally dies only to wake up in his next life. Reincarnated in the 1920s as a orphaned kid, how will he live in a universe filled to it's brim with cosmic beings-*DING*'Huh?'[Congratulations Host for receiving the Impregnation System]

The ordinary world is not ordinary, ordinary people are not ordinary, and safe places are not safe.

This is a story of a passer-by male protagonist who is entangled by various girls with strange hobbies or even non-human beings while surviving in the cracks and opening a harem.

- Description from novelbuddy