"世界欠我一个初恋" (A First Love Owes Me the World) seems to be a Chinese web series or movie. However, I can't provide direct links or specific instructions on where to watch it online as it may violate copyright laws.

I suggest you try searching for it on popular streaming platforms like iQiyi, Tencent Video, Youku, or others which legally host many Chinese dramas and movies. Alternatively, if you're in a region where these platforms aren't available, you might want to check if it's on regional legal streaming services.

Always remember to respect copyright laws when watching content online.