After finally completing the first route of his visual novel, Blessing Software's producer Tomoya Aki is optimistic about the future of his team and achieving their goal of creating the best game of the season. However, they still have a long way to go. For one, Megumi Katou still has an incredibly flat personality and is unable to fit the role of Tomoya's ideal heroine. The other members of Blessing Software, Eriri Spencer Sawamura, Utaha Kasumigaoka, and Michiru Hyoudou, often forget she is even there due to her lack of presence and character. Throughout the development of their game, Blessing Software learns the struggles of working in an industry where deadlines must be met and edits are made constantly, and the hardships of working in a group setting.

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.

Season 0 of House of the Dragon premiered on January 8, 2015.