[Himitsu] Koori (Ongoing)

Sana waves her classmates goodbye and stays behind in the empty classroom, her bag secretly packed with coiled rope and a ball gag — and before long the schoolgirl has bound herself tight from head to toe, drooling behind the harness and squirming in her pantyhose as she savors every cinched knot. Her private after-school indulgence quickly escalates from desk to chair to rolling across the floor in search of ever-tighter restraints, just as her friends start texting invitations to a crab dinner she can't answer. When a pigeon makes off with the very scissors she needs to escape, the gagged girl finds herself hopping after it in a muffled, teary plea, turning her solo bondage session into a hilariously helpless standoff.