Haha 40-sai, Joshikousei ni Narimashita

Ume Mori, 40 years old, has devoted her life to raising her daughter ever since giving birth to her 22 years ago. She has done everything possible to make her daughter happy, and her daughter is now a successful working adult. And then Ume realized, "I'm done being a mother. But wait, what am I going to do with the rest of my life…"

That was when she realized... she has a chance to relive her youth at age 40.

(Source: officeYOU, translated)