Horimiya -The Missing Pieces-

Kyoko Hori and Izumi Miyamura know each other's secrets. However, Miyamura is all gloomy during his school trip, his swimming classes, and other school activities. All because he has to protect the secret he shares with Hori...

Sports Day is around the corner. Sengoku and Sakura dread it as they are not good at sports. Miyamura also wants to avoid it after his previous experience. But before that fateful day, Sengoku, Remi, and Sakura have to survive the cooking lesson.

Sports Day is finally here. Hori and her friends are divided into different teams to participate in the cheerleading competition, mock cavalry battle, Scavenger Hunt, and relay race. The thrilling events ignite the fighting spirit of unmotivated students like Miyamura.

During winter, everyone is inexplicably drawn by Hori's kotatsu, including Sengoku, his father, Takeru, and Hori's father, Kyosuke. As everyone hangs out around the kotatsu, Kyosuke and Takeru turn out to be old rivals...?

Shu's sister, Motoko, has a crush on her classmate, Kitahara. As Motoko's protective brother, Shu gives Kitahara the cold shoulder. Yet it somehow achieves the opposite result...?

Miyamura, Ishikawa, and Iura are having a sleepover at Sengoku's. Curious about what Miyamura is hiding, Sengoku approaches the sleeping Miyamura in an attempt to find out Miyamura's secret. However, his plan goes terribly wrong...

Sakura and Yanagi become closer thanks to their shared passion for manga. However, the other students at school think that they are not a good match... Meanwhile, the lonely Sawada is also shunned by her classmates. Being a student can be a bittersweet experience.

The always-smiling Yanagi Akane cites poor eyesight to explain why he squints a lot. To everyone's surprise, he is not a morning person at all. When he is forcefully roused from his slumber, his grumpiness sounds rather... cute? The lesser-known side of Yanagi appears!

Just like its students, Katagiri High also has teachers of unique personalities. There is the English teacher, Mr. Yasuda, and the absent-minded Physics teacher, Mr. Nakamine. Due to a fortuitous incident, Yuki gets to spend some time alone with Mr. Nakamine...

Hori's schoolmate, Watabe, is a huge fan of Miyamura. He is obsessed with Miyamura. Meanwhile, Hori can pick up Watabe's scent on Miyamura's clothes. One day, Hori finds out that Watabe has "marked" Miyamura. She becomes jealous and the couple argue.

Valentine's Day is around the corner. Hori wasn't planning to make Miyamura—son of a patissier—chocolate but Remi told her not to be heartless. Meanwhile, Sawada is determined to send chocolate to Hori. Suddenly, Sawada's classmate turns to her for help.

Hori's parents, Kyosuke and Yuriko, share a different dynamic from ordinary married couples. They first met in what seems to be an unusual yet fated encounter.

Graduation is around the corner. Hori reflects upon her relationship with Miyamura—whatever world we're in, regardless of the friends we make, we will always meet each other.