The beach was teeming with girls, their belly buttons exposed under the bright sun. Suddenly, an unusual spectacle began; belly button worms started appearing, squirming into the exposed belly buttons.

Lily, a teenage girl, felt a tickling sensation in her belly button. She looked down to find a belly button worm squirming its way in. She gasped in surprise, causing others to look her way.

Lily became the center of attention. Her friends gathered around, their eyes wide with curiosity and a hint of fear. Lily could only giggle nervously, unsure of what was happening.

Daisy, the youngest in the group, was the most curious. She approached Lily tentatively, her eyes fixed on the tiny creature. 'Does it hurt?' she asked with a touch of concern in her voice.

As the day wore on, more girls experienced the belly button worm phenomenon. Loud moans echoed around the beach. Some girls were scared, but most found the experience harmless and exciting.

The belly button worms seemed to have a rule; they never returned to a belly button they had once occupied. This left the girls with a sense of relief and a story to tell.

Lily discovered that standing next to another girl with an exposed belly button would cause her belly button worm to leave her and squirm into the new girl's belly button. She shared this discovery with her friends.

Daisy was the first to try it out. She stood next to Lily, her belly button exposed. As predicted, Lily's belly button worm left her and squirmed into Daisy's belly button, eliciting a loud moan.

The beach turned into a hub of belly button worm transfers. The girls laughed and squealed in delight, their fears forgotten. The belly button worm had turned into a fascinating beach game.

As the day ended, the beach was filled with joyful laughter and unforgettable memories. The belly button worms disappeared as mysteriously as they had appeared, leaving behind a beach full of girls with exciting stories to share.