Pura Pura Chicketta

Mamiana is the quintessential office loner. One day, while eating her lunch by herself in the park during her lunch break, she happens upon her unapproachable senior colleague, Yato, having fun on the swings and kicking shoes...!? Together with Haniya, a woman in her 30s dressed as a maid, these three "big kids" wander around the neighborhood, reverting to their childhood. (Source: Kadokawa, translated)