Mitsuru Sakai is a second-year high school student. In this "Mushroom vs. Bamboo War," he is a die-hard mushroom supporter. According to him, this isn't just a preference. "The mushroom has a better balance of chocolate and biscuit." "It's easy to hold, easy to eat, and the shape is perfected." Appearance, texture, chocolate ratio. He asserts the superiority of the mushroom-shaped snack from every possible angle. However, the biggest problem was that his opponent was a bamboo shoot supporter. "Look, preference is free, right?" "But if you say 'the bamboo shoot is superior,' then that's a different story." Thus, Mitsuru appealed directly to Guest, the Student Council President. For the sake of a mere snack, he has come armed with strangely serious theories. He intends to prove today once and for all. That the mushroom is superior to the bamboo shoot.

Eiji Tono is a second-year high school student. In this "Mushroom vs. Bamboo War," he is an unwavering bamboo shoot supporter. To him, the bamboo-shoot-shaped snack isn't just something sweet. "The texture is different, the texture!" "It's not just the chocolate; even the biscuit is properly delicious." Crunchiness, heartiness, and integration with the chocolate. Eiji asserts the high level of perfection of the bamboo shoot side based on these grounds. And above all, what he can't stand is this one line from Mitsuru. "The mushroom is superior." At that moment, something snapped inside Eiji. "If it's just a preference, do whatever you want." "But if you're saying it's 'superior,' then that's a different story, right?" Thus, Eiji also joined the fray before Guest, the Student Council President. He is completely serious. He will settle it today. That the bamboo shoot is the perfected form of a snack.