Kami nomi zo Shiru Sekai

Synopsis

Due to helping Elsie capture spirits, Keima has gathered a large backlog of new games he has not played yet. During the weekend, he plans to finish all the games in his room by playing six games at the same time, doing so with impressive speed while still managing to logically make the right choices and enjoy each game individually, but he suffers from burnout later on. Elsie finds this shocking yet bewildering and leaves him alone. Realizing he cannot finish all of his games at this pace, Keima decides to up the ante by playing twenty-four games at once. Keima finally manages to finish all of his backlog games except one as he is too tired to continue, but he soon starts hallucinating that all of the game girls he captured are encouraging him to not give up. Rejuvenated, he finally finishes the last game and "follows" his game girls into the game world where they all sing and dance together. The episode ends with an announcement for the second season of the anime and a new character introduced.

(Source: Wikipedia)