OH MY GOD!? This story is perfectly up my alley and I just love it! The characters are well-defined with strong personalities and their banters are good. SFXs are used really well to sell the tension. The Lovecraftian tidbits here are very intriguing. It would absolutely be an amazing VN if things were more refined.
That being said, I do have some gripes. While I really think that the SFXs dramatically improved the scenes, the absence of audio became more apparent and deducted the overall experience. More ambiance sounds would be nice. I'm also not a fan of floating sprites. You've done a great job at emoting and manipulating the sprites, but for me personally, seeing them just float on the screen just felt off. I think some earlier scenes would even work better without Roan's sprite on screen. Lastly, I felt sometimes the lovey-dovey moments were not... appropriately placed? They lessen the built-up tension of some of the serious scenes, and honestly, those unsettling tensions are the best part of the story.
A very entertaining story, especially if you love the genre. The ending line gave me freaking chills. I can't wait for more!