The art style in ch 0 is v detailed, using 3D models as references for the art and shading depth rather than the typical flat color 2D style. It may not be for everyone (and I agree with others that the speech bubbles almost don't fit within the aesthetic!) but I'm incredibly excited to see unique art styles like this, it's still really quite beautiful and I think it may rather fit a tragic story such as this.
Honestly, I have been considering creating a webtoon of my own stories but have v little confidence in my art and my ability to not procrastinate, but as an artist this style appeals to me waaaaay more to draw than the usual cartoon-like style most readers come to expect.
hohoho maybe i should see if SSS needs cleaners??