Uchuujin no Kakushigoto

Synopsis:

The young lady I fell head over heels for is an outsider?! I, the class president, ended up falling head over heels for my schoolmate, the unconventional Haru. I admitted my sentiments, yet her actual character was an extraterrestrial who came to Earth to overview it. “I actually like you!” I began going out with Haru, however I have a further “secret” to keep.