Gravitational Love

A human boy named Jason is a senior in high school. Another unknown species girl named Ionia is a soon to be graduating assassination school 101. Ionia is sent on a mission that will allow to not only graduate at the top of her class but let her graduate early. The mission is to kill a human boy that learned the species. Her ship broke down in Jason's backyard and not knowing any better Ionia thinks this is where the boy lives. During the time limit on the assassination Ionia connects with Jason and couldn't do it so she left in hiding. What will the two be happy? Will Ionia come back?