MTL - Cataclysm King - Chapter 4 steamer

The 27-year-old Wei Han is a slightly fat, slightly chicken-livered, and slightly foolish, pure-hearted and besotted top, and his sweetheart who had been together with him for seven years, in the end, was stolen away by Qi ZhiFan one morning.
Deeply broken-hearted and in despair, he went overboard with binge eating, and ended up pathetically choking to death…

With the revival of spiritual energy and the breakdown of the order of species, it is a difficult test whether human beings can still stand at the top of the biological chain.

(There is already an old book, The Strongest Descends in the City, you can read it.)

- Description from novelbuddy

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

She was a 21st century’s forensic doctor. With her medical expertise, she uses her scalpels to save life and investigate the dead. Unfortunately, she transmigrated to the body of the unfavourable first daughter of Liu residence. At first sight, he looks handsome and charming; with his crotch erected underneath his half-naked body. She smiled and asked, “Have you been drugged, sir? A cure? One treatment costs two hundred taels.” He frowned dangerously as if to judge whether is she worth for him to give his body to her willingly. She quickly used her silver needles on seven acupuncture points and teasingly stared at his crotch. “Look, you calmed down immediately, aren’t I good?” The moment she finished her words, his member grew larger again. She got pinned down by this wretched prince, “I’ll give you four hundred taels, change another treatment method.” “F***!” She got unlucky, and that was how her son Liu XiaoLi got into her stomach.

…… On a fateful day, Liu XiaoLi was refining his medicine-making skill. The little punk walked towards his mom……

- Description from Novelupdates