"Morning group" is "모닝족"(mo-ning-jok) in Korean.
People to learn English in early morning with using a mobile device. You can listen to the voice in the smartphone, and the study of English through the Internet. It is a compound word of 모닝 (Morning) + 모 (mode) in 모바일 (mobile) + 닝 (Nin) which sound of 잉글리쉬 (English).