I Got Stronger By Using Copper Coins Until I Am Invincible - Chapter 552 - A bet on a key

An alien race invaded the Earth on June 6, 2128. At the midst of this war, many nations allied with the alien threat and the war nearly wiped out the rebelling humans of the planet. At the edge of mankind's survival, the United Nations Army launched its forces to eliminate the immediate stellar threats that loomed over Earth.

General Seeker Carlean, commander and leader of the mission, risked and gave his life to destroy the immediate stellar threat. The battle was won though Earth lay in ruins. Perhaps mankind will live to see a few years of peace before the alien threat returns to wipe out their existence.

At the immediate aftermath of the stellar battle, the fallen Seeker Carlean awakens and finds himself at aged 17, living the peaceful life he lived 16 years before he died.

So begins a new game in the battle for humanity's survival.

She was a medical expert, talented and beautiful. She was reborn as his little wife. Her in-laws did not like her, her husband did not love her, and she was as timid as a mouse. She was weak and easy to bully.

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.

(Warning: Mature Content - R-18)The Ultimate Heartbreaker Reincarnates, Only to Find Himself a Pathetic Pushover?In his past life, he had gone out of his way to win their affection, humbling himself to the point of self - annihilation. But how did they repay him?His first love abandoned him for a wealthy heir, mocking him as delusional and naive.His childhood friend despised his devotion, pretending not to recognize him when they crossed paths.And the queen bee of the school? She sneered at him, refusing to even glance in his direction.But now, the man has been reborn—cold, detached, and effortlessly commanding both power and allure. Women fall under his spell without hesitation.Until one day—His first love appeared before him in a slinky strapless dress, her eyes shimmering with tears, her voice trembling: “Please… give me another chance, Master. I’ll do anything you ask…”His childhood friend was pinned against the door, her breath uneven, her gaze filled with desperate longing: “Master, even if it’s just as your secret lover—I’d be willing…”The once - arrogant queen bee shed her coat, leaning close to whisper in his ear, her breath warm and shaky: “Master… please, let me make it up to you…”He let out a low chuckle, his long fingers trailing over their heated cheeks, his eyes glinting with mockery and disdain. “You want me now?” he murmured, his tone icy. “Too bad. You’re too late.”