Hinako and her friend, Tsukio, come up with a plan to encase their sub in plaster, making him into a plaster human.
They succeed in pouring plaster all over his body encasing him in a hard plaster shell!
(Of course, while laying down, it's impossible for that section of his back to harden up.)
They really layed it on thick here, getting it rock hard by the end. You plaster fans out there really should not miss this one!