This is really not mechanical ascension - Chapter 201 - 115: The Vault - A Wave of Fat_2

A wicked mother one day brought home a girl. The child was the hidden legitimate daughter of the duke, the heroine of [The Duke’s House Has Three Sons and One Daughter] Loretta. I was Melody, the villainous girl who tormented her and was condemned along with my mother. Not wanting to die like that, I decided to start treating her well now. I personally fed Loretta, put her to bed, and played with her. And then her reaction was…? “I want Melody to marry me!” Caught off guard by her endless affection, I too ended up entering the duke’s family, “I’ll stick right by Miss Melody’s side.” And there, it seems I’ve met a young lord who’s an even bigger ‘Melody fool’? All I did was be kind to survive, but why am I being loved…?!

Young and filial Fu Ting loved her father above all things, so when she had the chance to turn things around from her father’s past, she promised to follow through her mission until the very end.Fu Ting, daughter of a famous actor, watched as her father succumbed to his untimely fall from stardom and his eventual passing. When met with her own demise, the heavens granted her something no one could only dream of⁠—time travel to amend her father’s murky past. Although Fu Pei was a⁠ supposedly⁠ cold-hearted young boy, he could not help but care for his daughter…wait. This is his daughter?!Read a tale of great love, unconditional devotion, and a sprinkle of comedy with us. Just a word of precaution: don’t underestimate Fu Ting!

Liu Duo was a young girl whose grandmother sold her to four brothers with the intent to be a bride. Unwilling, she ran away the following night, only to fall unconscious while trying to get away. Unexpectedly, however, she was reborn with the spirit of a 25 year old woman, also named Liu Duo.

- Description from Novelupdates

A Count’s Daughter who lost in the running to become the Second Prince’s fianceé, Camilla. The Prince chose a Baron’s daughter as his fianceé, and the world blessed the two’s love as fated. On the other hand, Camilla who was tailored and elevated as the love’s villain in the end, as punishment she was made to marry a terribly fat and ugly man――called『Toad of the Swamp』from his appearance, a lord of a remote region named Alois.