The Days of Being the Richest Man in the Ninja World - Chapter 363 - 9. Explanation

In a world where the boundaries between dimensions are thinning, a young man named Kael Ardent is thrust into the Eternal Nexus, a realm where countless worlds converge. Here, the laws of reality are dictated by Aether, a mystical energy that fuels both creation and destruction. Kael discovers he is a Nexus Warden, a rare being capable of manipulating Aether to bridge worlds and command the forces of the Nexus.But the Nexus is not a place of peace. It is a battleground for Eldari, ancient beings who seek to control the Nexus and use its power to dominate all existence. Kael must navigate this treacherous realm, forge alliances with warriors from other worlds, and unlock the secrets of his own latent powers. As he grows stronger, he uncovers a prophecy that foretells the rise of a Prime Warden, a hero who will either save the Nexus or doom it to eternal chaos.

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

At twenty-four, Ashley Flynn had endured more than most. From the tragic loss of her parents to the lose of her marriage–and now, the mysterious abduction of her daughter. Just when she thought life couldn’t get any crueler, her ex-boyfriend resurfaced. Rich, powerful, and more relentless than ever, Lorenzo Grey was determined to win back Ashley’s heart, no matter how much she hated him. Or how long it took him.When she turned to him for help finding her missing daughter, he saw the perfect opportunity he had long awaited.“You mentioned that you wanted to help me find my daughter,” Ashley said, her voice trembling slightly.“Yes, I did...” Lorenzo replied, watching her like a hawk. “...but it won't come without a price.”Ashley hated him even more for trying to exploit her desperation–but he knew this was the only tool he had left to reclaim what was once his. And now, Ashley must do what she felt was necessary, even if it meant breaking her own defenses and craving the very man who once shattered her heart. Because to her, a mother’s love knows no limits—and no sacrifice was too great.

My childhood friend went to the academy.