Musou Yuugi (夢想遊戯)

Overview
Musou Yuugi (夢想遊戯, lit. "Dream Play") is a Yume Nikki fangame made by Atami (あたみ) (Pixiv ) who is also the producer of Lost † Game, ＊Illness＊ and M∞N. It stars Shirayuki (白雪), a girl who refuses to leave her room. The game seems to have a theme of Japanese folklore/theatre.

Gameplay
Musou Yuugi is like most Yume Nikki Fangames, Shirayuki enters the bed to sleep, and can then enter the nexus. After you collect an effect it later appears in the nexus.

Plot
It is possible that Shirayuki was involved in performing arts before becoming a shut in.

Musou Yuugi/Dream Play
Pixiv Release Post

Musou Yuugi (Chinese)
Yumenikki.info Page