Story
There are two worlds, this world and the heaven. Humans go up to the heaven after death, and come back to this world after they die on the heaven. The energy, which makes this circulation, is called "Felicita", a feeling of gratitude. Tomoharu is a training student at Aria Curare, which is an organization to collect "Felicita". One day, he is sent to a boarding high school with Naoko, his childhood friend, and Airi, his friend, for hands-on training. Their new life at school starts now...