Happy KuJi's Licensed night sleep mask series of 4 in this E series.
#4 here has Naoto Shirogane watching your moves with her eyes closed. 
You cannot escape a great detective.

After staying up til 6am, you'll want one of these to get your full rest.
Morgana would approve of that at least.
 
~This item qualifies for Lettermail super affordable shipping~!