FTHTD-155 Durability testing of swimsuits is institutionalized within the company! New female office worker checks the strength of the crotch fabric with sex.

"FALENO TUBE FIT" sports brand finally starts an in-house system to test the durability of new swimsuits on-site! The targets are new office ladies. Wearing a swimsuit under my clothes, I go to work every day. Never expected that applying oil → insertion → piston pressure test would become part of my daily routine. Feeling it thrust through the swimsuit! Wet and see-through, sliding all the way in! The timer keeps going even at climax! The evaluation criteria are penetration, see-through effect, and intensity! New graduates betting the company's fate with their swimsuits and bodies on their first mission!