Hello! I played your Demo!
From the twists and turns of the story, of which was presented to me, I really enjoyed it. I liked the writing a lot and that a single decision can lead to a different outcome.
On one part you figure out more context as to why the events are happening. In another it seems like the better choice, but the characters are ulimately still left in the dark.
I really liked how the characters were written, especially Ryuho and the importance of Shiro. Especially Ryuho's inner conflicts of which may be the cause to drive him over the edge of what is right and what is wrong.
The Demo ends on a good cliffhanger and leaves you wanting more. How did the characters get to this point? How did all of this escalate? How did they start out? How were Ryuho, Tairi, Shiro and Yomi at the very beginning before it all went down? Overall, it leaves me with immense curiosity of how the story unfolds.
Something I believe that could be improved upon is maybe giving healing items to the player as there were a couple of situations where I would have appreciated it to be able to fall back on some potions. This isn't a necesscity, it would just be a welcomed safety cushion.
Overall, great job on making this Demo, I enjoyed it!
Not sure if you are still working on this, but I hope, if you do, that development is going well!