Anata ga Shitekurenakute mo

Yoshino Michi is 32 years old. She's been married for five years, but hasn't had sex for the last two. It's not as if she doesn't get along with her husband, it's just that the sex part is lacking. It was a bit unexpected, but one night when she was drinking with her colleague, Niina Makoto, she confessed that her marriage had turned sexless. Then, a shocked Niina responded "My marriage is sexless, too," and smiled with a lonely look in his eyes.
(Source: Mangaupdates)
~~ Adapted from the manga series "Anata ga Shitekurenakute mo" (あなたがしてくれなくても) by Haruno Haru (ハルノ晴).