Sendai Yuusha wa Inkyou Shitai - Chapter 113 – The Preceding Hero and the Swimsuit Episode?

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.

Teresa is a timid human whose life has been a series of unfortunate events—until she meets Lucian Blackwood, a very rich and handsome man who awakens a deep, unexplainable connection within her. But Lucian, an alpha werewolf with a haunting past, is repelled by Teresa’s perceived weakness, blaming weakness for the tragedy that shaped his life. Unable to accept her as his mate, he rejects and humiliates her, leaving Teresa shattered.Just as she’s picking up the pieces, Adrian Daegon, an ancient vampire with his own dark allure, steps into her life, determined to win her heart. Now, Lucian is torn with regret, desperate to reclaim the woman he cast aside. But to do so, he must face a powerful vampire and confront his own fears—while somehow convincing Teresa to forgive his betrayal and reignite their lost bond. Can love and redemption overcome the scars of rejection, or has Lucian's cruel mistake cost him his mate forever?Torn between two powerful forces, Teresa must decide where her true destiny lies—in the fierce grip of the wolf who scorned her or the dark embrace of the vampire who vows to adore her.

At the end of the road, in the throes of despair and impending death, Le Yu shouted defiantly:“If you have the guts, then kill me.”The enemy sneered and said:“I've never heard such a strange request.”Le Yu died.Then Le Yu came back to life, living in the enemy's body.This is a story where being killed means possessing the killer.“Why are the ones who kill me always some enigmatic, cunning figures with complicated backstories and numerous impending quests?Why aren't there some honest, wealthy, lady-charmer winners in life coming to kill me!?”

Having a rough life growing up, Wang Tong had numerous dreams of living a better life. However, his alcoholic foster father sells him off as a space settler of the distant planet Norton for some pocket change. Soon after his arrival, the Zergs overran the planet and obliterated its defenses in a matter of minutes. What awaited Tong on Norton was more than just an unbearable environment – its gravity alone was five-times stronger than earth – there were also swarms of bugs, constant hunger, thirst, and desolation.

While he lives a year of total carnage and survival, humanity’s Confederation eventually overcomes the Zergs on Norton and the powerful survivor Wang Tong is given a recommendation to a once famous, but now dying military academy where he begins his life anew.

- Description from Novelupdates