Anata wo Shinjiteru - Samishii Kodomotachi

A teenage girl lives a life of misery under her alcoholic father, who often breaks his promises. Her mother seems to favor her little brother, adding to the pressure she feels at home. More mature than her classmates, she carries the weight of her family's dysfunction alone.

Lately, she notices a connection with one of the school's troublemakers, who has been showing unexpected kindness to her younger brother. When her father fails to take them to the zoo due to a hangover, the boy steps in and offers to take both siblings instead, sparking a fragile bond.