Gel prison (Pixiv Fanbox)

Fixating our trainees during certain sessions is quite important, especially if they’re known to kick and fight a lot, which could potentially harm our trainers and cause unnecessary chaos~ Stuck between two blocks of hardened gel, this trainee has no choice but to expose her most private parts while our trainers are free to milk her dry while the sucking sensation from the pumps placed over her nipples makes crave for more.