I very softly sketched the drawing with a blue pencil.
After that I started inking the girl with the Mangaka 01 black color.
With the same tool, I inked the rest of the scene. Be careful with the background lines don’t touch the main figure.
Afterward once everything is was inked, I erased the blue pencil lines.
I then coloured the girl (all the figure) with the brush tip of the Kurecolor“flesh color” tone marker, without coloring a small portion of the profile closer to the window, leaving it white.
With the fine tip of the Kurecolor “cobalt blue” marker I made fast lines on the windows, to represent the rain outside.