Collector of All Things Hidden Trophy in AKIBA'S TRIP: Undead & Undressed

To unlock this trophy, you need to get 100 pieces of underwear in total. In order to get these pieces, you need to perform a Full Strip. See Stare Into the Light... to know how to do a Full Strip. Do not worry as you will see nothing but a dazzling light covering their body. Pick up the underwear on the ground after you perform it. Please take note that you do not need to have 100 pieces at once, just sell any of them if you need more money.