Otona ni Nattemo

Ayano, an elementary school teacher in her thirties, stops by a bar one day and meets another woman named Akari. Sparks fly as the two chat, and before the night is over, Ayano even goes in for a kiss. Akari is intrigued but confused... especially when she discovers that Ayano has a husband! Both Ayano and Akari are about to find out that love doesn't get any easier, even as you grow older.

(Source: Seven Seas Entertainment)