Highschool student Kaho spends the summer holidays with her family in a vacation home. While Kaho falls in love with a girl there, her mother learns about her husband’s infidelity. In order to overcome their conflicts, all family members must find the courage to leave old habits behind.

Rohan Kishibe is a mangaka who can read people like a book. At work on a new creation, Rohan recalls a tale of the blackest painting ever made. Called the most evil of paintings, it used a paint that should not exist. Driven by the events linked to it, Rohan and his editor, Izumi, go to the Louvre in France for answers.

Lord Oda Nobunaga plans to control Japan where rival warlords battle by waging war against several clans. His vassal Araki Murashige stages a rebellion and promptly disappears.