Oxalis
Oxalis is a Oxalis family. The size of the flower is a thumb of adult. The color is pink. The leaves have three little leaves.
This flower is put in a plunter or in the garden. The petal closes on cloudy time.
This flower blooms in Winter and sell from November by the shop.
White color of Oxalis sell by the shop. The leaves have three rounding shape. I don't think same one.
This is formally known as Oxalis purpurea. This flower is called Fuyo-Katabami in Japan.