Fan of Vocaloid? This is highly recommended. Based on a Vocaloid song series, this anime adaptation will be released on the 13th April. There are also light novels and a manga for the series.
Plot; Shintaro Kisaragi--a HikiNEET who shut himself inside his room for 2 years and has been living his life normally until he met a cyber girl named Ene, who appeared in his computer screen when someone anonymously sent him a mysterious e-mail one year ago. One day, Ene had been messing up with Shintaro's PC. which cause him have to go to outside world for first time in 2 years.
Genre; Comedy, Romance, Supernatural, Sci-Fi
As far as I'm aware there is no full trailer for the anime, so the best I could find for you guys was this fanmade trailer;