"Putting on a slightly sexy lingerie can sometimes make you feel tense and tighten your body," said a colleague at work, leaving Yuuko unable to hide her agitation. That night, she took out lingerie from the closet and stared at her reflection in the mirror, remembering her feminine self for the first time in a long time. However, as she tried to tighten her resolve and work wearing lingerie at the office, her colleague Sugiura caught a glimpse of the lingerie peeking out from the gap in her skirt...