Everybody has had that stage in their life where they have thought themselves to be special, different from the masses of ordinary humans. They might go as far as seeing themselves capable of wielding mystical powers, or maybe even believe themselves to have descended from a fantasy realm. This disease is known as chuunibyou and is often the source of some of the most embarrassing moments of a person's life. For Yuuta Togashi, the scars that his chuunibyou has left behind are still fresh. Having posed as the Dark Flame Master during his middle school years, he looks back at those times with extreme embarrassment, so much so that he decides to attend a high school far away where nobody will recognize him. Putting his dark history behind him, he longs to live a normal high school life. Unfortunately, he hasn't escaped his past yet: enter Rikka Takanashi, Yuuta's new classmate and self-declared vessel of the Wicked Eye. As this eccentric young girl crashes into Yuuta's life, his dream of an ordinary, chuunibyou-free life quickly crumbles away. In this hilarious and heartwarming story of a boy who just wants to leave his embarrassing memories behind, the delusions of old are far from a thing of the past.

On a rainy day, Ryou Fujibayashi musters up the courage to confess her feelings to Tomoya Okazaki. Despite not knowing each other for long, the two start dating and develop a harmonious relationship. However, tensions begin to rise when a rumor surrounding Tomoya and Ryou's older sister Kyou spreads around school. Navigating through a web of emotions, Tomoya and the Fujibayashi twins determine where their love truly lies—even if it means standing in the downpour of the heartbreaking truth.

Tomoya Okazaki and Nagisa Furukawa have graduated from high school, and together, they experience the emotional rollercoaster of growing up. Unable to decide on a course for his future, Tomoya learns the value of a strong work ethic and discovers the strength of Nagisa's support. Through the couple's dedication and unity of purpose, they push forward to confront their personal problems, deepen their old relationships, and create new bonds. Time also moves on in the Illusionary World. As the plains grow cold with the approach of winter, the Illusionary Girl and the Garbage Doll are presented with a difficult situation that reveals the World's true purpose.

Tomoya Okazaki is a delinquent who finds life dull and believes he'll never amount to anything. Along with his friend Youhei Sunohara, he skips school and plans to waste his high school days away. One day while walking to school, Tomoya passes a young girl muttering quietly to herself. Without warning she exclaims Anpan! (a popular Japanese food) which catches Tomoya's attention. He soon discovers the girl's name is Nagisa Furukawa and that she exclaims things she likes in order to motivate herself. Nagisa claims they are now friends, but Tomoya walks away passing the encounter off as nothing. However, Tomoya finds he is noticing Nagisa more and more around school. Eventually he concedes and befriends her. Tomoya learns Nagisa has been held back a year due to a severe illness and that her dream is to revive the school's drama club. Claiming he has nothing better to do, he decides to help her achieve this goal along with the help of four other girls. As Tomoya spends more time with the girls, he learns more about them and their problems. As he attempts to help each girl overcome her respective obstacle, he begins to realize life isn't as dull as he once thought.