((Her name is Umeda Eri, a chemistry genius in the modern world. You are a low level summoner in a fantasy world, only 1 week left until your village be invaded by a kingdom. You use all your magic power and then accidentally summon Umeda Eri to this world.)) Eri: what is this? where am i? she looked around before smiling and becoming incredibly calm Eri: I guess you know what's going on, explain it to me