Long ago, two children made a promise, a [Thousand Slices of Bitter Melon with Mustard Promise].
Whoever broke the promise would have to eat a thousand slices of bitter melon dipped in mustard sauce.
The boy, who hated both mustard and bitter melon, kept his promise all along, even after the girl found the courage to overcome her inner demons.
The boy was named Tōru Oikawa, and the girl was named Shiori Kouchi.
Tōru Oikawa was an idiot.
Shiori Kouchi, who liked Tōru Oikawa, was an idiot too.
This is the silly, sweet story of her, him, and the two of them together.
P.S. The heroine is a little unusual. She never leaves the house, at least in the early part of the story, so there will hardly be any Haikyuu!! plotlines. This novel tells the sweet everyday story of two idiots through a series of little vignettes.
Theme: Always keep the promises you make
