MTL - Blackstone Code - ~ two thousand one hundred and eighty-one

The moment Kazuma arrived in the world of Jujutsu Kaisen, a cursed spirit knocked on his door, making him panic.Fortunately, he awakened the mission selection system.[Mission Option 1: Look into Gojo Satoru's eyes for ten seconds.Reward: Mangekyo Sharingan][Mission Option 2: Change Mei Mei's hairstyle to twin ponytails and have an in-depth communication with her~Reward: Tsukuyomi!]During the Shibuya Incident, Sukuna went crazy.Chibaku Tensei, Infinite Tsukuyomi, Susanoo...Yuji: “I thought that Gojo-sensei was already invincible. I didn't expect Kazuma to be even stronger than him.”Since he had arrived in this world, Kazuma vowed to make a happy ending.Gojo becoming Go/jo? That won't happen in his presence.Yuki, Nanami, Mai, Junpei...?He's going to save all of them.***This is just a translation. All credit goes to the original writers.Raw: 咒回：人生选择，开局万花筒！

[However, due to mysterious anomalies during host's initial awakening trial, the Aetherfall protocol has been permanently altered.Host will be subject to mandatory sequential trials even after other hosts have been offered options to trials— ALL TRIALS FOR HOST WILL BE MANDATORY.Until Paragon Ascension has been exceeded.Failure to complete any trial will result in the utter and irreversible termination of spirit and vessel.In summary:Host will either survive or be terminated.]---The regular nobody, done in by Truck-kun after being... distracted,transmigrates into the body of a side character from his most hated novel—during the awakening trial.Somehow, he finds a way to survive... or so he thought.In a world where everything revolves around the MC, a side character destined to die can only bring bad omens.He's given a near-impossible task by the trial system of this world—along with no option to reject other than death.And in a novel where characters were once one-dimensional, they’re now being seen from every side and perspective—things are far more complicated than he ever imagined.A world where heroes are hidden psychopaths, villains are deeply misunderstood,teachers are unstable, and teenagers are... Let's just say hormonal.What could possibly go wrong?

Villains.Characters who opposed the protagonist.There are charming villains, there are villains with a touching backstory, there are villains who are simply pure evil, there are villains you can sympathise, and there are villains who simply have that title because they aren't on the same side as the protagonist.But no matter what kind of villain you are, at the end of the day, you are just a stepping stone for a protagonist.But in this vast universe, where immortals can pluck the stars and gods can create the sun, there are villains who won't stand for their fate.They will trample over the protagonist and defy their predestined fates and declare to the heavens,“Villains aren't stepping stones!”

God plucked one of his creations from his first Earth and gave him a second chance in another one of his Earths...surprise it is in DxD! Now reincarnated as a perverted side character how will our poor protagonist handle his new identity? Well he probably wont make the choices you will want him to, that's for sure!