ナンデ パンツ？

This is just so weird that I had to post it, from ANN:

Shiawase Pantsu Includes Children's Panties as Promo (2006-03-01 13:24:20)
The January volume of Shiawase Pantsu, an adult lolicon manga, included a pair of panties as a promotional extra. It is not uncommon for erotic manga to include article of women's clothing as extras, however publisher Akaneshinsha proudly boast that the panties included with Shiawase Pantsu are for a 130cm tall girl, a size typically worn by pre-schoolers.

ANN