Yuusha no Segare - Volume 1, Final Chapter − The Manner of Departure

Witnessing her fiance’s derailment with her own eyes, she married a “poor and poor” poor second generation.

The next day, jewelry, diamonds, haute couture clothing, luxury cars and mansions were received softly.

He is a domineering president who is cold-hearted and black-bellied in front of others, and he is also a three-good man who spoils his wife, loves his wife, and loves his wife.

 …

Rumor has it that his cleanliness allergy makes him never touch a woman, but she is a complete exception;

Rumor has it that he is an ascetic man who is so indifferent to strangers that he is extremely gentle in front of her;

Rumor has it that he is generous and neat and never cares about others. After his marriage, he overturns countless vinegar jars every day…

Her married life: sweet, sour, sweet, sweet, bitter, salty;

His married life: Chai, rice, oil, salt, sauce, vinegar, vinegar, vinegar, vinegar, vinegar, vinegar, vinegar, tea.

- Description from novelbuddy

Because of an accident, Max transmigrated to the Lous Land and became a newborn red dragon.

He could’ve just grown up and matured normally, and he would already be at the top of the food chain, but then he obtained the Discipline Makes You Stronger System.

“Congratulations to the host for completing 20 push-ups daily and persisting for one week, bonus reward Red Dragon Physique +100.”

“Congratulations to the host for completing daily swims in the lava and persisting for one week, bonus reward Dragon Breath damage x10.”

“Congratulations to the host for kidnapping one princess a day and persisting for one week, bonus reward Never-falling Golden Gun.”

“Cough, excuse me System, I’m a Dragon, I’m fine without this reward!” Max said hurriedly. Many years later, the name of Max the Red Dragon echoed through the multiverse. Only the mother dragon standing beside tilted her head and said with a puzzled face, “What, what in the world did I give birth to?”

The story is centred around a cute android who initially had a happy life with her master who dearly loved her. But she was then struck by a series of misfortunes and ended up in a robot-equivalent of concentration camp. Through experiencing and witnessing the sufferings towards herself as well as the people/robots around her, she eventually gained a better appreciation of life.