Tonari no Uchuubito ga Kowai

Marunouchi-kun has always harbored a singular, all-consuming passion: aliens. For him, nothing in the universe is more fascinating than extraterrestrial life, and his obsession shapes every aspect of his daily existence. When a new transfer student arrives at his school who happens to be an actual alien, Marunouchi believes his wildest dreams have finally come true. He anticipates that this otherworldly classmate will be a spectacular being from beyond the stars, offering him the ultimate opportunity to indulge his boundless curiosity about the cosmos. However, the reality of the situation quickly veers into unexpected and unsettling territory. Rather than behaving like the magnificent creature he imagined, his new classmate reveals a deeply obsessive and terrifyingly possessive side. The alien develops an intense, yandere-like fixation on Marunouchi, transforming what should have been a dream come true into something far more complicated and frightening. Caught between his unwavering enthusiasm for extraterrestrials and the alarming behavior of the one sitting right next to him, Marunouchi finds himself navigating a bizarre dynamic. This unique story explores the strange intersection of a boy whose interests are exclusively limited to aliens and an alien whose interests have become dangerously focused entirely on him.