What is the movie "Goddess of Toilet" about?

Brief introduction to the plot of toilet goddess ...

In an ordinary town, Yoko Uemura (Yui Natsukawa), a single mother who works on the ground floor of a hotel, raises four children by herself: Peach, Guangsheng, Xu Mei and cauliflower (Mana Ashida). The smallest cauliflower is naughty and lovely, and it is a pistachio at home. However, she often feels that she is not valued. After being wronged, she ran to her grandfather (Nenji Kobayashi) and grandmother (Shima Iwashita) next door and began to cry. Soon, the kind grandfather passed away, and grandma's face was always lonely. Cauliflower moved to live next door, and the grandparents and grandchildren lived together, and they got happiness and happiness from each other. Time flies, cauliflower (Bei Nai きぃ) has grown up in a blink of an eye, and the small house can no longer encircle her footsteps, but grandma has always encouraged her to move on. ...

This film is based on Kana Uemura's original work of the same name.