Underage tells the story of how the Serrano sisters, namely Celine, Carrie, and Chynna are forced to face adulthood too soon by going through various emotional mishaps with their family, after a malicious video involving the three of them went viral online.

• Lexi Gonzales
• Elijah Alejo
• Hailey Mendez
• Gil Cuerva
• Vince Crisostomo
• Sunshine Cruz
• Snooky Serna
• Jean Saburit