Due to Rainbow's upcoming debut in Japan, member Seung Ah celebrated her birthday in advance with a special birthday cake from her fans. Her birthday is actually on September 13th, but fans decided to go ahead and celebrate it in advance before Rainbow leaves for Japan. Instead of a regular cream cake, fans specially ordered a cake made entirely out of 'Hwe' (or 'sashimi') along with 'maeuntang' (fish stew) for all of the Rainbow members. Seung Ah thanked fans through her Twitter by writing, "This is the first time I've ever received a 'Hwe' cake!� It's such a special present that I don't think I'll ever forget it for the rest of my life.� I'm so very upset that I won't be with our Korean fans on my birthday, but I'll repay the support by doing well in Japan." Rainbow will soon be crossing over to Japan to promote their debut single, "A". Source + Photos: Sports Chosun via Nate