【Oshi no Ko】When is Hoshino Ai's Birthday? Official Settings and Fan Questions Analysis

In the super popular anime work "Oshi no Ko," the absolute core member of the legendary idol group "B-Komachi," Hoshino Ai, has become the focus of countless fans' attention due to her unique charm and profound story background. Beyond her entertainment career, secret life, and ultimately tragic fate, fans are also very curious about this character's personal details, with one common question being the specific date of "Hoshino Ai's Birthday".

Many fans naturally want to know on which day their beloved idol character was born. However, regarding the question of "Hoshino Ai's Birthday", as of now (April 2025), the original manga authors of "Oshi no Ko," Aka Akasaka and Mengo Yokoyari, have not explicitly announced Hoshino Ai's specific birth month and day in the main manga chapters, tankobon extras, official interviews, or any publicly available official setting materials.

Although within the "Oshi no Ko" story, timeline clues and character ages are important elements driving the plot—for example, we know Hoshino Ai gave birth to the twin protagonists Aqua and Ruby at age 16 and was tragically killed at age 20—her exact birth date does not seem to have been given special plot significance, and thus the creators have chosen not to specifically set or reveal it.