Zombie Sagashitemasu is a Manga/Manhwa/Manhua in (English/Raw) language, THRILLER
series, english chapters have been translated and you can read them here. You are reading Zombie Sagashitemasu chapters on https://mangabtt.com, fastest updating comic site. The Summary is
The manga is set in a world where 90 percent of humans on Earth have contracted and died from a deadly, virulent disease; only to then rise again as zombies who only attack people. 13 years after that "Red Day" of societal and civilizational collapse, the surviving humans survive away from the big cities, while still hoping to retake them someday. An entirely new generation of people who know nothing of the pre-Red Day world are now coming into their own. The story begins when Aki and her close friends Haru and Natsuki begin a journey to find Aki's missing father.