22 years ago, H.O.T. debuted and captivated the hearts of many teenage girls. At the height of their fame, they decided to part ways but not before making a promise to their fans. They promised that the goodbye was temporary and that one day they will come back as one. As time passed, their fans wondered, "Will H.O.T. come back as a whole, just like g.o.d. and Sech Kies?" It's been 17 years since then, and the 5 members have finally come together to keep their promise through Infinite Challenge.