**Chapter 1: The Unexpected Reincarnation**

Takashi Yamada, a 30-year-old office worker and avid anime and manga fan, was walking home from work on a typical Monday evening. As he strolled through the crowded streets, his mind wandered to the latest episode of his favorite show, and he couldn't help but drool over the beautiful illustrations of the female characters in his favorite manga. His thoughts were interrupted by a sudden pain in his chest, and before he could even process what was happening, he collapsed onto the sidewalk. The next thing Takashi knew, he found himself standing in a grand throne room, surrounded by opulent decorations and majestic architecture. The room was filled with a faint scent of roses and vanilla, and the air was sweet with the sound of soft music. As he looked around, a petite, adorable girl with long, curly brown hair and sparkling blue eyes sat on the throne, gazing at him with an intense expression. The girl, who appeared to be around 10-11 years old, beckoned Takashi closer with a chubby hand. However, as he approached, he noticed that her eyes seemed to hold a maturity and authority that belied her youthful appearance. "Greetings, Takashi Yamada," she said in a melodious voice. "I am Queen Lilith, ruler of this realm. You have been summoned here for a great purpose." Takashi's mind reeled as he tried to process the situation. "W-what's going on? Where am I?" Queen Lilith smiled, and her eyes sparkled with mischief. "You, Takashi Yamada, have been chosen to help me with a problem. You see, our world has been plagued by a terrible curse. A Demon Lord, known as the 'Eternal Youth Bringer,' has been draining the life force of our world, allowing us to remain eternally youthful, but at a terrible cost." Takashi's eyes widened in confusion. "Eternal youth? That sounds like a dream come true!" Queen Lilith's expression turned somber. "Not quite. You see, in our world, all women remain youthful and beautiful, like myself. However, the men... they still grow old and die. It's a cruel fate, don't you think?" Takashi nodded, beginning to understand. "I see. So, what's my role in all this?" The queen leaned forward, her voice taking on a serious tone. "The Demon Lord's power is the source of our eternal youth. But, in order to defeat him, we need a brave warrior. And, for some reason, I have chosen you for this task." As Takashi pondered his situation, Queen Lilith continued, "In our society, it's considered a great shame for a man to have fewer than five wives. In fact, having less than five wives is not only frowned upon but also incurs significant fines, as it's seen as not contributing to the well-being of our community. This is because our unique circumstances require men to take on multiple roles, not just as partners but also as providers and protectors. Polygamy is not just a social norm but a necessity for our society's survival." Takashi's eyes grew wide with shock. "Five wives? You mean, I'm expected to...?" The queen nodded. "Yes, it's a big responsibility, but I assure you, it will be worth it. You'll be rewarded with a life of luxury, love, and companionship. But, I must warn you, the journey ahead will be difficult, and you'll need all the help you can get." Takashi's mind reeled as he tried to process the revelation. Five wives? He was still trying to wrap his head around the fact that he was in a fantasy world, and now he was expected to take on multiple partners? The queen's voice interrupted his thoughts. "Your journey begins now, Takashi Yamada. Will you help me defeat the Demon Lord and save our world?" As Takashi hesitated, a door behind the throne slid open, and a group of beautiful, youthful women entered the room. They all had similar features to Queen Lilith, with petite builds and adorable faces. Takashi's eyes widened as he realized that these women were likely his future wives... What will Takashi do?