Thank you for viewing. There are small frills at the collar and the base of the sleeves. It's very cute when worn. The frills aren't large, so it's easy to wear. It's size M, but it fits the body, so I think it's better to consider it as size S. The fabric is quite sturdy, so I think your underwear won't be visible. The white color is closest to the photo on the last page. The condition isn't bad, but I've worn it several times, so I would appreciate it if you could understand. Thank you.