Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 509

Ronnie, a college student with a boring life has everything around him change when his whole world is turned upside down by a woman he accidentally summons while trying to summon a magical familiar as a game.His peaceful and tranquil days are disrupted as he tries to help her fit into human society while also searching for a way to break their bond.Hell further breaks loose when he discovers that his familiar is indeed the demon queen and mysterious forces start trying to eliminate him for reasons unknown.He struggles to protect himself, adjusting to having a demon queen in his life, and understanding his growing feelings for her.

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

[ Loki, The God of Mischief, Jest, and Woe, is amused. ][ The Goddess of Fate and Luck is annoyed. ][ You are the cause and center of two gods fighting. ]Ethan Cross, a brilliant doctor in a futuristic Earth, was devastated when he realized that his entire life—and the life of the woman he loved—was nothing more than a source of amusement for a mischievous god.But when another god, the Goddess of Fate and Luck, intervened on his behalf, Ethan found himself at the center of a divine battle, gaining a dangerous but powerful gift.[ You’ve awakened the SSS-RANKED SKILL: Fate Breaker! ][ You’ve awakened a system: The Supreme Fate Breaker System. ]For a fleeting moment, hope returned. Ethan was offered a chance to save Claire, the woman he couldn’t bear to lose.[ You’ve been granted God-Level Authority for three seconds. ][ Do you wish to rewind Claire’s soul trajectory?]“Yes!”But fate had other plans.[ Bug detected. ][ Message included with bug. ][ “It’s from me, your favorite god—Loki, the God of Mischief.” ][ 1-second system override has been taken by the God of Mischief. ][ Your soul has been sent to an alternate universe. ]Now thrust into a world of magic and monsters, where gods toy with mortal lives, Ethan must adapt or perish.

This novel is also known as The World Is A Wasteland: I Obtained A Top Tier Shelter

The meteorite destroyed the world, and the global people traveled to the wasteland world!

The monstrous flood, the ice age, the advent of alien beasts, the plant plague…

Under the random disaster once every seven days, if you want to survive, you must build a higher-level shelter!

Lin Yue awakened the 100% treasure chest system, and since then he has opened up a completely different style of painting from others.

Others: “The explosion rate of the treasure chest is too low? I still haven’t killed fifty mutant creatures!”

Lin Yue: “There are too many boxes and there is no room in the inventory. Do I have to upgrade the shelter to build a warehouse? Oh, it’s so annoying.”

- Description from novelbuddy