Kaisei Sakamoto is a 16 year old boy who is inclined to settle everything with his fists. He grew up in a town where you can see both Nagazaki and Gunkanjima, living with his father. His father, Genkai Sakamoto, runs a small ramen shop. The father-son duo has just recently had a large fight. The story showcases fragments of one's youth and the questions that crop up while growing up.
One day a mysterious box arrived and a curse began to spread all over. The source of the box is 'Jukai Village'. The village is hidden in Jukai Forest, a suicide spot that once you enter it, you can never come out.
A mysterious international crime organization makes a demand of 900 million yen from the Japanese government for the release of hostages. The group then targets a victory parade of a world sports game to commit indiscriminate terror.
One snowy night, in a mountain hut, Minokichi, a hunter, sees a snow woman killing his mentor Mosaku. “Should you tell anyone, I will take your life” she says, then drifts off. A year later, Minokichi meets and marries a beauty named Yuki. She bears him a daughter, Ume. 14 years pass and Ume blossoms into a radiant lady who befriends the sickly Mikio, the village leader’s son and Mosaku’s distant relative. Mikio soon dies in the same hut as Mosaku, with his body showing the same frostbite scars. Minokichi is reminded of that horrid night, and wonders what it was that he saw, and who Yuki really is.
Three stories from Shiratsuna Island: "Mikan no hana"
Shiratsuna Island is the only remaining island city in Japan, but it is being merged with a city on the opposite shore. Housewife Misato Tomita lives on the island. "Umi no hoshi"
Yōhei Hamasaki, who was born on Shiratsuna Island, lives in an apartment in the outskirts of Tokyo with his wife, Tomomi, and their son, Taichi. "Kumo no ito"
Popular artist Hirotaka Kurosaki, who is a native of Shiratsuna Island, goes back to his hometown after seven years.
Yuri Kashiwaga was once known as a genius pianist. One day, she returns to her hometown in Goto Islands from Tokyo. There, she begins to work as a temporary teacher at a middle school and advisor for the school chorus. The chorus aims to take part at a competition. Yuri gives the members of the chorus members an assignment. She instructs them to write a letter with the title of “To myself 15 years later.” The 15-year-old boys and girls write about their secrets and worries.
