Every year, the flowers bloom. Mysterious cherry blossoms bloom all over a crescent-shaped island. That island is the island of Hatsune... Asakura Junnichi, the main character who attends Kazami Academy, has the power to see other people's dreams in his sleep. He was also taught magic by an old lady that allows him to create sweets. One day, Junnichi seems to have seen someone's dream again while he was sleeping. Inside that dream, a girl who was his childhood friend appeared. But he was woken up by his sister, Asakura Nemu, forcing him to return to his regular life. Nemu does not actually have any blood relation to Junnichi, but their bond is deeper than that of other real brothers and sisters. It is so deep that it gives the illusion that they are lovers. It was another peaceful, normal day, waking up early in the morning and going to Kazami Academy. Together with childhood friend Amakase Miharu, the academy idol Shirakawa Kotori, and the two sisters Mizukoshi Moe and Mako, who prefer eating nabe on the school roof for lunch. Going through their day as usual, their childhood friend Yoshino Sakura, whom they thought had moved to America, suddenly appears. It was a surprise for Junnichi and Nemu. Sakura tells them, "I came to finish the promise we made during our childhood"... (description from AnimeNfo)