Sabishinbo (1985)

Sabishinbo 1985 / さびしんぼう 1985 / Miss Lonely , Lonelyheart , Lonely Heart , Sabishinbou

Lonely and love-struck high-school student Hiroki pursues one girl, but another one mysteriously appears in his life. Is she a figment of his lonely psyche, or real? An intricate triangle develops, and the viewer can't quite be sure what is happening until the whole story is neatly resolved at the end. (Source: Rob Richardson at IMDb)