Volume 15: The Return of the Oppai Dragon

“Issei’s mission to return to the Isekai world grows ever more desperate. With every step, he uncovers the secrets of the ancient powers, while struggling with the weight of the bonds that tie him to both worlds. His journey is far from over…”

Chapter 66: The Ritual of Power

The days after Issei’s discovery of the spell were filled with uncertainty. He now had a goal: to reactivate the portal back to the Isekai world. The ritual he’d found required a mixture of true bonds, spiritual energy, and the Oppai Gear, a tool he still didn't fully understand.

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Issei sat in his room late at night, surrounded by books, scrolls, and artifacts. He’d tried everything he could think of: incantations, magic circles, and even talking to the ancient Nyx for guidance. But nothing worked.

"I need to find a way to draw more power from the Oppai Gear," he muttered, his eyes scanning the symbols on the parchment in front of him.

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Suddenly, his phone buzzed with a message.

“Issei... I know you’re trying to get back.” It was Rias. His heart skipped a beat. “You have to know… you’re not alone in this.”

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Issei gritted his teeth. “I know they want to help… But I can’t let them. This is my fight.”

But deep down, he knew the bond he shared with his Isekai friends could give him the strength he needed.

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As Issei pondered over the ritual, something started to click in his mind. The Oppai Gear, the ancient weapon that had protected him for so long, was tied to his very soul. It wasn't just a tool—it was a vessel of power. He needed to fully accept it and unlock its true potential.