Demon Slave: Whose Slave?

"I am the leader of the seventh team of the Magic Defense Team, Kyoka Hazen--you are the victim of this disaster in the Magic City, right?" "Getting there on time was a huge help." "Don't worry, I will save you." ... ... "The situation is not good and I need your help." Me: "Whatever I can do, I can cooperate with you." Kyoka: "Then from now on, you will be my slave." Me: "?" ... ... Slave fanfic of Magic City Soldiers, Green Harmony, non-original world line, and original world view; Combat, food, live broadcast, daily life, super powers.