"Have you ever spared a pig or a cow because it begged you for its life?"

  — Mereum, Hunter x Hunter

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  When Roy woke up in the m, he discovered that the system had added three new worlds to the travel list, along with oravel attempt.

  He also o prepare to face the High-Css Devil Riser Phenex.

  Why Riser Phenex, you ask?

  Well, it's obvious, isn't it?

  Because of Rias, she wouldn't be able to defeat Riser Phenex, so Roy had to step in. He couldn't just stand by and watch Rias marry Riser.

  Of course, with Roy's current strength, fag Riser was a losing battle. Riser possessed the traits of a Phoenix, including immortality.

  Any injury would simply be followed by rebirth from the ashes. Even Rias Power of Destru was useless against him in the inal story.

  In fact, if Riser didn't have immortality, his strength wouldn't be that impressive. But with that bug-like ability, defeating him at the same level was impossible without special means.

  Therefore, Roy had to bee stronger, and quickly.

  He g the three newly avaible worlds.

  The first world: My Little Sister 't Be This Cute.

  Another slice-of-life anime...

  Although Kuroneko was cute, now wasn't the time to chase girls.

  He moved on to the world.

  The sed world: Pokémon.

  This was a world where Pokémon and humans coexisted. Humans, as trainers, would capture, train, and battle with Pokémon. They would nurture them or keep them as pets.

  As a Devil, having a Familiar was essential, but he would have to visit this world aime.

  The third world: Demon Syer.

  The moment he saw this world, Roy's eyes lit up. This was it.

  Demon Syer, a cssiime, was deeply ingrained in Roy's memory. It was also a world with maing monsters called Demons.

  The first Demon to appear was named Muzan Kibutsuji.

  Muzan Kibutsuji was born in the distant Heian period. Before he was even born, Muzan almost died due to his frail body.

  He ractically a stillborn. But with a desperate will to live, Muzan cwed his way back from the brink of death.

  However, before he even reached the age of twenty, he became bedridden with a terminal illness.

  A kind doctor, hoping to prolong his life, developed a medie for him. But the medie's side effects led Muzan to believe his dition had worsened, and in a fit e, he killed the doctor.

  Only after the doctor's death did Muzan realize that not only had his health beeored, but he had also gained an immortal and even stronger body. However, he also developed a craving for human flesh and blood.

  While this wasn't a problem for Muzan, who had gained immense power, he had oal weakness: sunlight was lethal to him.

  To overe this weakness, Muzan studied the doctor's medie formu and discovered that the final product required a pnt called the "Blue Spider Lily."

  However, only the doctor knew where this Blue Spider Lily grew and how to Grow it.

  Thus, Muzan, in his quest to bee the ultimate immortal monster, begaing tless Demons to search for the Blue Spider Lily.

  This was the in of Demons.

  Opposing them was the Demon Syer Corps.

  The first Demon Syer was Yoriichi Tsugikuni, the younger son of the Tsugikuni .

  Yoriichi was also the first swordsman to master Breathing Styles.

  He was exceptionally gifted, born with the Demon Syer Mark and an innate uanding of the Transparent World and the principles of Breathing Styles.

  As an adult, Yoriichi created Suhing based on his uanding of Breathing Styles.

  Its primary fun was tthen the heart and lungs, allowing the blood to absorb a rge amount of oxygen in a short time.

  This could instantly increase physical abilities, temporarily granting strength parable to a Demon's.

  However, because others couldn't withstand the power of the sun, they couldn't learn Suhing.

  Yoriichi then guided them to develop other Breathing Styles derived from Suhing, including the five basic styles: Water, Thunder, Fme, Stone, and Wind.

  After that, the members of the Demon Syer Corps created a variety of derived Breathing Styles based on these five foundational ones.

  The emergence of Breathing Styles provided the Demon Syer Corps with a powerful on against Demons, gradually giving them an advantage in the war against them.

  And what ied Roy the most were these Breathing Styles.

  He had researched Breathing Styles long ago, but he couldn't grasp the essentials.

  This was uandable. Even Yoriichi was born with an innate uanding of Breathing Styles, which allowed him to create Suhing.

  Otherwise, with Roy's talent in swordsmanship, he could have bee a formidable force by creating his owhing Style.

  Therefore, his primary goal in going to the Demon Syer world was to acquire a Breathing Style, which should be retively easy to achieve. The Demon Syer Corps didn't keep their Breathing Styles secret.

  His sedary goal was to recruit a few servants to increase his strength, preferably enough to allow him to bee an High-Css.

  With his mind made up, Roy took Saeko's hand and smiled at the irls. "See you all ter!"

  He theed the Demon Syer world.

  In the moment, they vanished in a fsh of white light, leaving the irls behind.

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