Jitaku no Kagi wa Toroana no Naka: Ijiwaru na Yubi de Hojirarete

"Oh! Don't stick your key in there!"
I want to thrust my big, thick dick deep inside that sensitive butt that is protruding through the wall.
(Source: Coolmic)
Note: Simultaneously released in long-strip and traditional formats, with 27 and 9 chapters respectively.