The Great War finally came to an end after four long years of conflict; fractured in two, the continent of Telesis slowly began to flourish once again. Caught up in the bloodshed was Violet Evergarden, a young girl raised for the sole purpose of decimating enemy lines. Hospitalized and maimed in a bloody skirmish during the War's final leg, she was left with only words from the person she held dearest, but with no understanding of their meaning. Recovering from her wounds, Violet starts a new life working at CH Postal Services after a falling out with her new intended guardian family. There, she witnesses by pure chance the work of an Auto Memory Doll, amanuenses that transcribe people's thoughts and feelings into words on paper. Moved by the notion, Violet begins work as an Auto Memory Doll, a trade that will take her on an adventure, one that will reshape the lives of her clients and hopefully lead to self-discovery.

One year ago, Sagiri Izumi became step-siblings with Masamune Izumi. But the sudden death of their parents tears their new family apart, resulting in Sagiri becoming a shut-in which cut her off from her brother and society. While caring for what's left of his family, Masamune earns a living as a published light novel author with one small problem: he's never actually met his acclaimed illustrator, Eromanga-sensei, infamous for drawing the most lewd erotica. Through an embarrassing chain of events, he learns that his very own little sister was his partner the whole time! As new characters and challenges appear, Masamune and Sagiri must now face the light novel industry together. Eromanga-Sensei follows the development of their relationship and their struggle to become successful; and as Sagiri slowly grows out of her shell, just how long will she be able to hide her true persona from the rest of the world?

Kirino Kousaka embodies the ideal student with equally entrancing looks. Her grades are near perfect, and to cover her personal expenses, she works as a professional model alongside her best friend Ayase Aragaki, who abhors liars and all things otaku. But what Ayase doesn't know is that Kirino harbors a deep, entrenched secret that will soon be brought to light. At home one day, Kyousuke, Kirino's perfectly average brother, stumbles upon an erotic game that belongs to none other than his seemingly flawless little sister. With her reputation at stake, Kirino places a gag order on her sibling while simultaneously introducing him to the world of eroge and anime. Through Kirino, Kyousuke encounters the gothic lolita Ruri Gokou and the bespectacled otaku Saori Makishima, thus jump-starting an entirely new lifestyle. But as he becomes more and more involved in his little sister's secret life, it becomes that much harder to keep under wraps.

Tomoya Aki, an otaku, has been obsessed with collecting anime and light novels for years, attaching himself to various series with captivating stories and characters. Now, he wants to have a chance of providing the same experience for others by creating his own game, but unfortunately, Tomoya cannot do this task by himself. He successfully recruits childhood friend Eriri Spencer Sawamura to illustrate and literary elitist Utaha Kasumigaoka to write the script for his visual novel, while he directs. Super-group now in hand, Tomoya only needs an inspiration to base his project on, and luckily meets the beautiful, docile Megumi Katou, who he then models his main character after. Using what knowledge he has, Tomoya creates a new doujin circle with hopes to touch the hearts of those who play their game. What he does not realize, is that to invoke these emotions, the creators have had to experience the same feelings in their own lives.