Kanata and his mother relocate from Fukushima to a new area where he finds trouble to connect with his peers, being uncertain of how to deal with the death of his father which was caused by an earthquake when he was younger. But Kanata slowly opens up when he meets Riku, the son of his much-admired homeroom teacher. However a troubling relationship dwells between father and son, and the two boys gradually grow closer.

"Every house has a front door and behind every door is a family drama."