This is captivating. The mystery is engaging and the relationship screen with the description of the characters' point of view is a great way to portray it instead of a percentage bar! It makes the story more immersive, and the characters are very different from each other, as well as very charismatic in their own ways.
Such a fascinating plot, and the OSTs make the scenes even more immersive. (And that's coming from me, who don't usually like sounds during my reading, but in this case, the melodies were a perfect match with the environment.)
I'll definitely keep an eye in this story, and I'm waiting for the third chapter. :)