As a Male High School Student, I Met an Elf Girl

Have you ever thought that there are alien creatures outside the earth that have been eyeing the earth and want to occupy it? Have you ever thought that humans will one day work with the elves from another world to resist the invaders? The seemingly peaceful world has actually set off an undercurrent. As a high school student, I originally lived a calm life until I went hiking that day and met that girl...