"Please... just let me go..." That plea turns into laughter before it can even be heard. The tickle torture has finally reached its fourth chapter. This time, the stage is standing restraint x slippery oil. Suzaki Miwa's entire body, now highly sensitive, is exposed with no way to escape. Last time, she went beyond the limit by wetting herself. This time, she restarts wearing new underwear. ...However, what she's wearing is 'underwear'...