I became a nouveau riche and found a poor young lady as my fiancée

A down-and-out young lady, a loyal maid, a childhood sweetheart, a sick otaku, an actor's housekeeper, etc. Songgang Dong said helplessly that she just wanted to live the boring and tedious life of a rich person.
"Thank God, I will be your fiancée from now on!"
"what?"
Poor Songgang Dong was lucky enough to join the army of time travelers and even became a nouveau riche. However, when faced with the girl who suddenly came in and declared, he was still so surprised that his jaw almost dropped.
"It is up to you to make your son's family a noble family."
"You, a nouveau riche, are not worthy of Miss Shinomiya," the former maid of the Shinomiya family shouted angrily.
"Boy, the fourth palace is mine, I advise you to be sensible," said a certain young man.
"It seems that he is the son of the nouveau riche. It is said that he is engaged to the eldest daughter of the Shinomiya family." At a certain banquet.
"The Shigong family is really putting flowers on cow dung, but Shigong's relatives are really heartless."
"I want revenge!" Shinomiya Mikoto looked at Matsuoka Dong with cold eyes.
"Okay," Song Gangdong nodded.
(No system, moderate sweetness and sourness, positive outlook)