The main character, Tsuboi Ryota, is a salaryman often criticized for being physically big, but with a “small” heart, and he is stuck in a dilemma of not really being able to fit in both at work and at home. But one day, his estranged father falls ill and with that, his “happy enough” life begins to change.
A mysterious beauty, a man who claims to know his father’s past appears, and his father begins to act in strange ways... It turns out, his father had been looking for the legendary “small creature” in his hometown! Though he doesn’t believe that it actually exists, he begins to meet with many people to uncover his father’s mystery, and slowly his feelings begin to change.
Maybe, no there’s no such thing...but just maybe...it really does exist?