Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 17 - 17-1. Ceremony

Sylas Gray returns to his hometown in the countryside for a winter vacation to his ancestral home, only to find himself caught in the midst of an apocalyptic outbreak. The world descends into chaos as the undead overrun everything, and the small town he grew up in is no exception.With hope dwindling and death lurking around every corner, Sylas witnesses unspeakable horrors—brutal killings, betrayals, and the darker side of human nature. Yet, amidst the despair, Sylas refuses to give up. Determined to escape the town and reach the capital, he is thrust into a shocking revelation.A mysterious change occurs within him, granting Sylas the ability to sense and control space. He discovers that he possesses a pocket of space within his own body—a power that could be his key to survival.Follow Sylas as he embarks on a perilous journey, fighting to survive, uncovering the truth behind the apocalypse, and discovering the true potential of his newfound abilities.

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet."
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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Just as Ye Fan got dumped by a gold-digger, he received a call from the hospital. Little did he expect that, ten months ago on one fateful night, he and his crush Bai Susu did something unspeakable… From that moment on, he embarked on the path of a doting dad… Pampering his wife, spoiling his kids… Unlimited affection!“Hello, Mr. Ye Fan, your wife is about to give birth in the hospital, hurry over to sign the paperwork!” An urgent voice sounded from the phone.“What, what’s going on, kid, and wife?” Ye Fan was utterly bewildered at that moment.… Just got dumped, then his biggest crush came knocking on his door.From then on, he embarked on the journey of spoiling his wife, spoiling his kids, unlimitedly! They had a grand wedding, everyone in town joined in the love fest! As the saying went, good things should be shared together, not alonel! So, let’s all enjoy the love fest together!

The first part is finished, and the second part is starting. Two worlds of immortals and demons, and the boundless universe. This decides the tone of the second part!