The Invisible Enemies Goal is? is the 39th episode of the Katekyo Hitman Reborn! anime.
A Vongola weapon alteration expert, namely, Giannini shows up to improve everyone's weapon, but ends up ruining them. Meanwhile, two men appear from the Arcobaleno Verde's orders, aiming to assassinate Tsuna all while Kyoko, Haru, and Hana are over to go over their dreams since elementary essays.
This episode therefore showcases the events that take place as these assassins are being caught so that Tsuna does not get injured. This is also the episode that features chibi Gokudera who appears due to the malfunctioned 10 years bazooka.