I'm not sure exactly when it's ending. You might want to keep an eye on the official announcements from the publisher or the manga creator's social media.
Sorry, I don't have the exact info on when the Rent a Girlfriend manga will end. But typically, these things are revealed gradually, and you can expect some hints or announcements as the story approaches its conclusion. Maybe follow some manga enthusiast communities for the latest scoop.
Chapter 214 is the strongest chapter-level answer because it starts from Director Sun fell silent for a second. and follows through on Even when Wen Jiaojiao fanned Richards' face frantically, he remained....
Look to Chapter 229 for the clearest answer. It begins with Huo Ziyang's face had already turned deathly pale., keeps building through Huo Xuan, how did she come to know about this?!, and lands on Isn't it enough to teach a child a lesson when he makes a mistake?.
Look to Chapter 278 for the clearest answer. It begins with People from the fan club also got word that Jiang Li was soon to return to..., keeps building through Early in the morning, as the president of the fan club, Lu Xingchao..., and lands on How about we throw a party instead?" He Yun was.
A practical answer is Chapter 268, because it turns the idea into a concrete scene. The chapter opens with To ensure the company's successful listing, Shen Lan even went so far as..., adds pressure through Having chosen to be his wife, she was determined to be responsible for his..., and ends on.
The best chapter pointer here is Chapter 266, "He Really Deserves to Die!". It opens with Upon hearing this, the deputy director's expression also turned serious. and closes on Now I see why Jiang Li despises her brother so much, utterly unreliable!"....
A practical answer is Chapter 219, because it turns the idea into a concrete scene. The chapter opens with Qi Tianyu was somewhat freaking out., adds pressure through —[This agricultural expert is the real deal.] After all, if the production..., and ends on Having any yield at all was already the.
Look to Chapter 264 for the clearest answer. It begins with Jiang Li first reassured her mother, then opened the chat box with Shen..., keeps building through She had just sent a message when Shen Lan's video call came through., and lands on [Do your faces hurt, you rumormongers?.
A practical answer is Chapter 228, because it turns the idea into a concrete scene. The chapter opens with Huo Ziyang had not stepped out of the house for a whole week., adds pressure through She would never allow such scum in her family!, and ends on Why did you hit Ziyang?" Huo Xuan, one hand.