It's Not Easy to Be a Man After Travelling to the Future (WN) - Chapter 1490: Do you regret it? Was it worth it?

When Logan and his classmates are suddenly transported to a world teetering on the brink of destruction, they find themselves thrust into a desperate battle against a relentless demon invasion. In this new realm of magic and peril, each student discovers unique powers to aid humanity's fight for survival. However, Logan's ability to tame creatures is deemed the weakest among his peers, earning him scorn and ridicule.Despite the doubts of those around him, Logan's determination never wavers. As he bonds with mystical beasts and uncovers their hidden strengths, he begins to realize that his power might be the key to turning the tide of war. With every creature he tames, Logan grows stronger, proving that true strength lies not in raw power but in the heart and courage to stand against overwhelming odds.Logan's journey is not just about battling demons; it's also a personal struggle against his own loner personality. Having always been an outsider, Logan must learn to trust and connect with others, both human and beast. His solitary nature is challenged as he forms unlikely friendships and alliances, discovering that unity and cooperation are essential in the fight for survival.

Let’s fight! Go! Who am I afraid of with a chip that turns into a brain cell? ! Get promoted and get rich! The nest treasures are all mine!

- Description from novelbuddy

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

Reborn as an Evolving Space Monster.The Paru is a peculiar Species that can be found billions of light-years away from Earth, on a small planet covered by strange minerals and crystals. The Parus are peaceful, as they can eat anything. From earth, to minerals, all suits their tastes. Why would such a peaceful Species develop the ability to Evolve by Devouring? The Parus Devour the minerals and crystals, which allow their shells to grow tougher and tougher every day. What happens when a person is Reborn as a Paru? What happens when a Paru isn't seeking a peaceful life, but one filled with adventure, adrenaline-pumping fights, and otherworldly beauties?The peaceful Species turns into a Calamity feared by this universe, and the next.