Sono Otoko, Unmei ni Tsuki

Shiori, an unremarkable, perfectly ordinary office lady, has a secret life at night: she's a popular palm reader!? She started this side job for reasons unknown, keeping it a secret from everyone. But of all people, the last person she wanted to find out has discovered it! Matsudaira Ken, a "scumbag general" who's competent at work but a womanizer. He's taken a liking to Shiori, and she's forced to serve him as his slave—!?

(Source: Shogakukan, translated)