I began with a reference line drawing from the "How to Draw Manga-Couples" then added the hands, hair, muscles, light source, shadows/highlights, pillow, fabric wrinkles, etc.

As usual, the thumbnail does not show the subtle details. Shu's tongue is almost not seen here. The gradient has a crosshatch pattern, the sheet has a grid texture and the pillow has a dot texture.

My critique:

On Shuichi:
S's hand is too small and I don't think I got the position of S's head just right. I like how the hair finally shaped up. Back in January, when I started this, S's hair was not working at all. I have a better handle on S's hair now. And S's nose is not perfect, but it looks better than what I had before.

On Eiri:
I like the relaxed passion in E's face. He has let go of having to be in charge and is enjoying receiving S's loving licks. The hair was fun to do, all frazzled and a little sweaty. I wanted to add more detail to the face but I also wanted the light source to be above, so the face remained simple.