Me no Doku Sugiru Shokuba no Futari

The manga follows the adventures of an office lady, Todoroki (30), who is also a fujoshi. With the arrival of two new colleagues: Hongou (32), a mature man whose face doesn't show any emotion, and Daichi (25), a bright young man full of life; it's hard for her not to imagine these two in torrid situations...

(Source: Overlap, translated)