A young man named Haku stood before an ornate fish tank, mesmerized by the vibrant underwater world it contained. With each gentle bubble escaping the surface, Haku's thoughts were crushed under the weight of the enigma it presented. In the stillness of the night, the tranquil scene invited introspection.

Under the moon's anemic light, a spectral figure emerged from the tank. An anime boy, with aquatic features, catching Haku off guard. His iridescent eyes shimmered, reflecting the lights from the neighboring buildings. Scale-like patterns ran down his arms, slipping in and out of visibility as they danced with the ripples caused by an unseen breeze.

Raising a hand, the boy drew a circular pattern on the glass, creating a shimmering vortex. Holding it up, he whispered in a language unknown to Haku, but understood by the denizens beneath. They responded in kind,ubnfurling a legend, never before heard, of a hidden world in the depths of existence. No sooner had the boy vanished, leaving behind an intriguing puzzle only the brave would dare to uncover.