Action

World: High School of the Dead - Kimetsu no Yaiba - Danmachi -
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    When he was reincarnated, he knew that his future would be great.
    Becoming a tech billionaire, having a chic life surrounded by many beautiful girls, and happy days forever!
    Yet, all of that future was going to disappear when he realized that zombies were going to ravage the world.
    In such a future, all of his wealth and savings would become nothing!
    When he was helpless about what to do, he saw a dying black cat and dog on the street, surrounded by many flies. Everyone ignored those dying animals and just continued with their lives. He also planned to do so, but when he thought about his future, he decided to do a good deed for the last time.
    Yet, when he was about to bury those two dying animals, he saw the fly that landed on his hand disappear.
    [You have acquired the DNA of fly.]
    [Do you want to absorb it?]
    "........................"
    At that moment, he realized his future would be more amazing than he had thought.
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    By the way, the photo profile is the mother of Tanjiro Kamado from Kimetsu no Yaiba.