【Desu no ya ☆】The Sea of Wondrous Dreams† Nightmare†.

[mysterious dream of the sea].
>>https://www.dlsite.com/home/work/=/product_id/RJ260047.html

This is a version of the game where all stages of the game are very bad.
Please be careful not to pick this up by mistake if you are a first timer.
We’re waiting for you, brave souls, to take on these nightmare stages!

サイト:http://www.desunoya.sakura.ne.jp/product/tobari2_n/
紹介動画:https://www.youtube.com/watch?v=2mgHo84CYuY