I’ll Be the Male Leads Sister-in-Law - Chapter 559

Alex, a socially awkward guy with a mundane life, dies in the most ridiculous way imaginable — slipping on a banana peel while whacking off to an adult film. His embarrassing demise leads to an even stranger fate: he wakes up reincarnated as Jonny Sins, a rising star in a parallel universe where adult film actors are legendary heroes wielding unique powers of charm, seduction, and stamina.But life as a hero-pornstar is more complicated than it looks. Jonny is guided by Lustina, a seductive, snarky AI system offering him power-ups and quests — all with a price. As he navigates the absurdity of this erotic world, Alex discovers deeper mysteries about the System bound to him. Why was he chosen? What is Lustina’s true purpose? And why does the fate of the erotic multiverse seem to rest on his… performance?Armed with special techniques, limitless stamina, and newfound confidence, Alex must embrace his new identity as the Legendary Hero of Many Professions — doctor, soldier, astronaut, teacher… and aggressive step-daddy — to rise through the ranks and confront the ultimate threat to pleasure and freedom.It’s going to be a wild ride.–––[Jonny I've got an audition for you, are you interested?]Jonny: what's that?[Do you wanna act in a porn fraction? The role is an amateur twick is available for now]Jonny: Do you really want me to act as an amateur twick?.[If you aren't ok playing the role of an amateur twick, there is another role available. The role of an aggressive step daddy]Jonny: I choose the step daddy! I always loved to be a stepdad. I was born to play this role.

You had taken up the Student profession

You had now reached level 7.

Acquired skills: elementary school knowledge, junior school knowledge, and senior high school knowledge.

You took the university entrance exam and scored full marks.

Your have been upgraded to level 9, and you have activated the profession-change interface.

You became a scientist and gained R&D skills.

You used R&D skills and gained space fortress-building technology.

You used R&D skills and gained starship technology.

You are now invincible.

The hero who was killed by the demon king ended up reincarnated as the son of the one who killed him! Thus began the life of the hero who donned in the mask of the ideal demon prince to topple his own kingdom while doing his best to prevent anyone from discovering his identity―― But to do that and blend into the demon tribe society, he had to kill his former comrades. Nevertheless, to become stronger, to save humanity, he had to walk through all kinds of paths of carnage! This is the tale of the demon race’s fake prince destroying his own kingdom.

O Hero, Trample Those Who You Should Protect!

TN: Most part of the other character in the novel is depicted from a non-human perspective so expect something that is completely different from the common sense of human.