Reset (2009)

Mari Nagasawa, a recluse often called "hikikomori", falls in love with Makoto through chat sessions on the internet. When Makoto asks Mari out on a date all her insecurities surfaces again and she's unable to go. Then her confident younger sister, Risa decides to go in her place. When things seem unable to get any stranger, a mysterious man named Anri suddenly appears before Mari and asks her, "Will you let me reset your life?" .