Usotsuki Hanayome to Dousei Kekkon-ron

Rei Shigisawa knows she's out of step with society. While everyone around her is getting married and having babies, as a gay woman, Rei feels like those things will never happen for her. Instead of looking for romance, she's thrown herself into her work and is content with that. That is, until she happens to run into Saya Gotou, a former colleague. Saya is petite, cute, and has always been popular with men. So it's no surprise that Rei used to have a crush on her, but she squashed those feelings when Saya got married. Now, however, Saya comes to Rei begging for help, saying she's had a fight with her husband and has nowhere else to go. Rei quickly agrees to help her out, and soon her crush is back with a vengeance! Rei knows it's a bad idea to fall for a married woman, but can she possibly resist Saya's charms?!

(Source: Seven Seas Entertainment)