This was taken from a scene in the lounge car. Naoki's first meeting with Lucifer where things got a bit heated... >x> Luci goes out of his way to make Nao embarrassed.. plus... Nao had a bit to much sake.
Here Luci just said "Do you feel hotter when I'm closer to you?" And then did this where I proceeded to squeal internally.
Ah~~ good times xD
Naoki (c) Me