through rereading several times there is 5 character present here(on the house including the guy from the military) lets call the blue haired B and the military guy M and the white guy W and haegyung and woojin..... i think that B and W are dating(speculation) and the M guy is like a ex or sex friend, on the last scene haegyung fell on the floor with his toys and woojin saw him there ( AND LEST WAIT FOR THE NEST CHAPTER CAUSE WHY NOT)