Meeting you changed me. There are things that are certainly there, even if they are invisible to the eyes of the two girls. As the end of summer vacation spent almost every day with Kanon approaches, Saki notices the announcement of a summer festival. Despite her dislike for crowds and darkness, she invites Kanon to enjoy the fireworks from her own balcony, where they can see the display. Feeling that she has only been receiving kindness from Saki, Kanon watches the fireworks and expresses, "I want to give something back to Saki." In response to those words, Saki writes down a certain note... The latest volume of the story about the bond between two girls, which has been translated and received a huge response worldwide!