Yuka Takakura

In the decade since the world became aware of the existence of magic, the world has undergone a massive upheaval. However, a boy named Touta lives in seclusion in a rural town far removed from these changes. His ordinary life is highlighted by his magic-using female teacher and his supportive friends. When his tranquil daily life is disrupted, he embarks on a unique adventure.

In the present day, hundreds of extraterrestrial species walk the Earth. Some are pacifistic, others violent. Some are here for research purposes, others are career criminals. However, humans don't know they are here. Now, one more alien has arrived on Earth. One of the universe's foremost geniuses with a personality that's bound to attract all sorts of trouble. (myanimelist.net)