Rang Ni Dang Shou Shi Ren, Ni Kaiju Jiepou Liao Qian Nüyou

It started in anatomy class. The corpse on the dissection table... it was my ex-girlfriend. Ever since that day, I've been pulled into a world of incomprehensible horrors. A decommissioned bus that only lets passengers on, never off, on a one-way trip to the bottom of the reservoir. An ancient, thriving tree in the hospital courtyard that devours people, leaving not even the bones behind. A giant carp by the river, begging for help night after agonizing night. And a deadly brothel draped in human skin, a place that never, ever closes its doors. A ceaseless, vicious cycle... a nightmare that seemingly has no end... (Source: Bilibili Comics, translated)