Sefure no Hinkaku

Choko enters a friends with benefits relationship with her high school crush, Kazuki. She is now 36 years old, twice divorced, and has a teenager daughter who she raises on her own. Kazuki works as a doctor in a women's clinic, and doesn't want to marry or have a deeper relationship. They agree to just sleep with each other when one of them wants to do it. But of course, feelings and drama stand in the way.