KyoZaNa✿'s Manga

A mother-in-law who is abandoned by her family after tormenting the female lead.
A wicked woman who is feared by her husband and her son. That was me in this novel world.
To avoid the cruel ending of the novel, I took in my young daughter-in-law, the female lead who was abused and raised her well, with hope she will take my side when the come! That’s what I thought.

The K-drama version is still on-air.

A fourth-year student of the biology department at the St. Petersburg Naval Academy, named Desharow, caught a mysterious black-scaled mermaid in the waters near Iceland while on a research expedition with his mentor, Rhein. The powerful and beautiful creature immediately captivated Desharow, who was obsessed with his academic research, not realizing that he had already become the prey of the mermaid.
≫➤ Their story somehow reminds me of the movie "THE SHAPE OF WATER".
Novel at chrysanthemumgarden is super hot smut, too bad they make manhua as Shonen-ai.

【(())】Sasha found out when she’s about to die that her newly husband was actually lover of her stepsis and they conspired with her stepmom to kill her for inheritance!
Whatsoever she went back in time 2 moths prior to the incident. To protect herself, Sesha proposed one-year contractual marriage to Grand Duke Therdeo since he didn’t want to marry the psycho princess who's crazily obsessed with him. Surprisingly she had to die 2 more times in a row there..!!