Zhao, Qian, Sun, and Li were brothers who lived in a dormitory of a certain university. One day, they collectively traveled to the world of ABO and became royal concubines. They have a system and need to complete their tasks before they can go home. But how could the system in the ABO world let them go so easily? Come on, boys, and wish you good luck.
Intention: Although there are many flags, how can we open up a new path without struggling?