Chitose Karasuma of the "Since I Was Born Year" in the Without Friends Calendar meets Chiffon, a girl from whom the space pirate Erebus had stolen Lost Technology from. In order to take back what was stolen and gather other Lost Technology before the pirates can, the Angel Troupe was cooperating with Chiffon. However, Chiffon is continually perplexed by the Angel Troupe's lack of teamwork. Her number one supporter is Chitose and she has no combat ability. Can they really succeed at gathering up the Lost Technology!?