Living as a villain in manga usually involves having a selfish agenda, using underhanded tactics, and facing opposition from heroes. It's all about creating drama and tension in the story.
Hiroya Oku likely starts with a concept or story idea. Then, he sketches out the characters and plotlines. After that, he refines the details and adds depth to the story through continuous revisions.
Villain Just Wants to Live was a sci-fi web novel written by the lazy Flying Snow. The novel told the story of the male protagonist being forced to become the strongest villain. He only wanted to live, but he was always fueled by various bizarre events. This novel had been updated to 324 chapters, and the latest chapter was chapter 324, Little White, can you change back? (Finale). The novel was published on Qidian Chinese Network and was categorized as a fantasy magic novel.
The villains in " Duty-in-law " included Su Wenxing, Shopkeeper Xi, Yang Lingxiao, Grand Preceptor He, Wu Qihao, Nuzhen, Fang Tianlei, He Yuanchang, etc. Su Wenxing was the most incompetent person in the Su family. He was often used by others and eventually led to the decline of the Su family because of his alliance with outsiders. Shopkeeper Xi was a selfish person. He was unwilling to be under Ning Yi and eventually became a traitor. Yang Lingxiao was an extremely conceited and cunning person who always wanted to obstruct the development of the male lead, Zhao Li Chun. Grand Preceptor He was the biggest villain in " Duty-in-law ". For his own personal gain, he did not hesitate to cooperate with the enemy country and instigated the Emperor of the Wu Dynasty to cut off Qin Siyuan's political affairs. Wu Qihao was the unluckiest of the villains. He was jealous of Ning Yi's strength, but he was eventually defeated by Ning Yi. The Jurchen was the biggest villain in the book. After she appeared, she assisted the prime minister and became the protagonist's opponent. Fang Tianlei was a person who caused trouble and was eventually arrested. He Yuanchang was the villain who was killed by Baili Hongji's men.
Well, without having read the 'takarakuji de 40 oku atattandakedo light novel', it's hard to say for certain. However, given the title, it seems likely that the story is centered around a situation where someone has come into possession of 40 oku, which could be a very large amount of money or some valuable asset in the context of the story. It might explore themes such as the impact of sudden wealth on one's life, relationships, and personal values. The 'takarakuji' part might imply that this wealth was obtained through a lottery - like event, and the light novel could then detail the various adventures, challenges, and emotions that follow this major change in the character's circumstances.