Set after the Tohoku earthquake and tsunami, all 14-year-old Sumida Yuichi wants to become is a regular boy and live a decent life. His environment though repeatedly drags him into the mud. He runs his parent's rental boat business, which is located next to a nondescript lake. His mother frequently comes home with different men and soon she leaves him entirely. His father only comes around looking for money. Chazawa Keiko is a classmate of Sumida Yuichi. She harbors a severe crush on Yuichi. Keiko's home life isn't much better than Yuichi's. Her mother builds a gallows with a noose in place for Keiko to take her own life. Her mother believes her life would be better off without Keiko.
Under these circumstances, Keiko pays a visit to Yuichi's home. A group of people are lingering nearby who live in makeshift tents on the property. Keiko tries to befriend Yuichi, but she is berated and even physically assaulted. She doesn't get deterred though and sticks around.