Hackquantum Collection

All three episodes of the Japanese anime series following a trio of high school students who immerse themselves in 'The World', the most popular computer game of its day. The students, Sakuya (voice of Kana Hanazawa), Tobias (Miyuki Sawashiro) and Mary (Ayumi Fujimura), become all but lost to the real world while playing the game. Fortunately for them, help is at hand in the shape of a mysterious player named Hermit (Yui Ogura), who changes their lives forever.

The episodes are: 'Walking Party', 'Wired Prisoner' and 'The World-end Pallbearer'.