17 parts Complete MatureSet in between the final battle at Incheon from 'MONSTER' and the biggest K-pop event of the year in 2028, we follow Red Velvet's Wendy, Seulgi, Blackpink's Rosé, and new recruit Twice's Dahyun in an IPG mission to bring Kobayashi Sabito, better known as 'Someone-san', home from his exile in Japan. In Seoul, Sabito's girlfriend Momo waited patiently for his boyfriend, but another girl also anxiously awaits Sabito's arrival: His little sister Kobayashi Sachiko.
Apart from the mission itself, a lot of unfinished business are also going on. How would Wendy and Rosé fare together, as Wendy was marrying Rosé's ex Pastor Jonathan Cho in the summer? Would Rosé gladly give her blessing? Also, what about Seulgi and Dahyun's clear attraction for one another? Would Dahyun finally open up her heart again after so much hurt?
Join this limited series as we slowly step out of LSMU's Phase One and into Phase Two!