My Little Monster
となりの怪物くん (original)
Starring Masaki Suda, Tao Tsuchiya, Yuki Furukawa, Yuki Yamada, Elaiza Ikeda, Minami Hamabe, Gaku Sano, Mocomichi Hayami, Shirō Sano, Kazunori Mimura
It's a drama and comedy movie, and has a rating of 5.9 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Italy.