As stated I forgot the title about a story. I remember that there was a girl who was summoned in to another world and came back. She is super strong, was/is in love with her childhood friend. She also was part of an organisation in the other world, don't remember which... As for her being away for so long, she forgot a lot about the people of the original world. This is kinda the reason I liked it. These are the only things I still remeber. For anyone who helps or tries to help: thank you.