Harem Technique

This jutsu combines the Shadow Clone Technique and the Sexy Technique to create multiple clones of a beautiful, nude woman (or in a bathing suit, as in some filler episodes and video games). Naruto uses a modified form of this technique in episode 193 when he transforms into dozens of clones of Sakura (still clothed) in order to confuse Rock Lee.

The A-Rank classification is probably due to the fact that a Multiple Shadow Clone Technique is involved, which is considered a kinjutsu due to the fact that it drains the user's chakra according to how many clones are created.