At school, Kuroi and Shiraishi are dubbed the 'idiot couple' for their paradoxical dynamic. While individually bright, their union results in comical ineptitude, particularly evident in their public displays of affection and obliviousness. The real twist, however, lies in a peculiar ailment: their overwhelming bliss triggers physical reactions, preventing even a simple hand-hold without nosebleeds. Undeterred, the pair persists in showcasing their love through unconventional means, despite the strain it puts on their fragile hearts.