I have a childhood friend who I've been close with for a long time, but they're now girls. Apparently, they wanted to have one or two pairs of underwear for special occasions, so they bought some online, but because they were sexy underwear, they had it delivered to my house to prevent their parents from finding out! Since we're like family, I decided to hold a fitting party in my room without permission! They were embarrassed by the exposure, which was more than they expected, and of course, as my lower body reacted, they gradually started to feel sexy...