For lingering close-ups of panties sometimes the exercise videos are great - like this one of cute Mir-chan, which I could not resist as she is wearing my absolute favourite white cotton panties.
Importantly, these panties fit her perfectly and at one point she even tucks her skirt in allowing unobstructed views as she lifts her leg and counts to 8. If only she could have counted to 20!
Some of the other exercises do not provide such a good view, but this is made up by some good close-ups.