We've Got Two Divorces and No Labels Between Us

Mami has tried marriage once and failed, so now she's looking for something else. Even if her peers won't get it, she wants what she wants: not marriage, not romance, just a man to spend time with when she needs some company!

Sure enough, when she brings this up at her junior high class reunion, her friends all gang up against her. However, a handsome former classmate she'd almost never spoken to before--Nakamura--does empathize with her! When Mami learns that Nakamura is also once-divorced and, just like her, is looking not for a wife or a girlfriend but just a woman to spend time with, she makes a life-changing decision.

She's given up on living her life according to what's "normal." After spending thirty-some years toiling under the crushing weight of societal expectations, one woman finds herself a partner in crime and a new lease on life in this modern-day survival story.

source: https://www.mangaupdates.com/series/mtmm0lc/batsuichi-2-ri-wa-mitei-na-kankei