As a child, Moritaka Mashiro dreamt of becoming a mangaka, just like his childhood hero and uncle, Tarou Kawaguchi, creator of a popular gag manga. But when tragedy strikes, he gives up on his dream and spends his middle school days studying, aiming to become a salaryman instead. One day, his classmate Akito Takagi, the school's top student and aspiring writer, notices the detailed drawings in Moritaka's notebook. Seeing the vast potential of his artistic talent, Akito approaches Moritaka, proposing that they become mangaka together. After much convincing, Moritaka realizes that if he is able to create a popular manga series, he may be able to get the girl he has a crush on, Miho Azuki, to take part in the anime adaptation as a voice actor. Thus the pair begins creating manga under the pen name Muto Ashirogi, hoping to become the greatest mangaka in Japan, the likes of which no one has ever seen.

OZ, a virtual world connected to the internet, has become extremely popular worldwide as a spot for people to engage in a large variety of activities, such as playing sports or shopping, through avatars created and customized by the user. OZ also possesses a near impenetrable security due to its strong encryption, ensuring that any personal data transmitted through the networks will be kept safe in order to protect those who use it. Because of its convenient applications, the majority of society has become highly dependent on the simulated reality, even going as far as entrusting the system with bringing back the unmanned asteroid explorer, Arawashi. Kenji Koiso is a 17-year-old math genius and part-time OZ moderator who is invited by his crush Natsuki Shinohara on a summer trip. But unbeknownst to him, this adventure requires him to act as her fiancé. Shortly after arriving at Natsuki's family's estate, which is preparing for her great-grandmother's 90th birthday, he receives a strange, coded message on his cell phone from an unknown sender who challenges him to solve it. Kenji is able to crack the code, but little does he know that his math expertise has just put Earth in great danger.

Despite the immediate challenges following becoming a devil hunter with the Public Safety Bureau, Denji has quickly adapted to his new life and responsibilities. As the chaos of Denji's first ordeal with Public Safety settles down, the elite devil hunter Makima decides to take Denji out on a date. Although the date strengthens his affection for Makima and he swears to not fall in love with anyone else, Denji soon finds himself in a tricky situation when he meets a seemingly innocent cafe worker named Reze. With her forward and flirty demeanor, Reze immediately captures Denji's heart, driving him to frequent the cafe where she works and deepen his relationship with her. However, Denji is completely oblivious to the fact that meeting Reze might have grave consequences beyond simply deciding which woman his heart belongs to.

Several years have passed since the end of The Great War. As the radio tower in Leidenschaftlich continues to be built, telephones will soon become more relevant, leading to a decline in demand for Auto Memory Dolls. Even so, Violet Evergarden continues to rise in fame after her constant success with writing letters. However, sometimes the one thing you long for is the one thing that does not appear. Violet Evergarden Movie follows Violet as she continues to comprehend the concept of emotion and the meaning of love. At the same time, she pursues a glimmer of hope that the man who once told her, I love you, may still be alive even after the many years that have passed.