The world of humans and friendly creatures

In this world, humans get their partner friends at age 6, children as soon as they turn 6 gets 5 friends, all small sized as doll, 2 non floating anime friends, 2 floating chibi friends and one non floating chibi friend, 1 floating chibi friend is 1 year younger than the child and the non floating chibi friend is one year older, they become their permanent friends, this thing was invented in science so no child feels lonely and they get living friends non ai but human like that help them develop,these friends are like real friends who stay with them these are alive scientifically made creatures specially for children and like the same interests as the child plus all their expenses are free, so we follow a american boy ryan who just became 6 and is getting his friends for first time, also for more info these friends even help him in study 3 of the friends are in same class as him and study together, 1 is younger whom they guide and 1 is older who guided them, these friends even follow the humans after school even in college,job,etc like forever and only die after the human die