Douyara Kanojo wa Uchujin Rashii
どうやら彼女は宇宙人らしい
During the first year of high school, the narrator begins a relationship with a girl who, upon accepting his offer, says she is not from Earth. Initially, he interprets this as a hint that she may behave unusually at times. However, he later realizes that her statement may be literally true, suggesting she could be an alien.