The battle between Ryohei and Kouyou begins and Ryohei uses his Vongola Gear to summon the newly upgraded Kangaryuu. Ryohei then orders it to go to Cambio Forma and Kangaryuu fuses with him to form Knuckle's Maximum Break. But to the Vongola's surprise, Kouyou states that he knows all about the Maximum Break and its flaw of only being able to be used for three minutes. Kouyou continues to state that the Simon have had people spying on the Vongola the whole time but refuses to state who and activates his Flame revealing it to be the Forest Flame.
Ryohei states to Kouyou that the Maximum Break he is using has been modified to work specifically for him and that the time limit has been removed so he can fight longer than 3 minutes with it. However, Kouyou keeps his cool and belittles Ryohei's abilities. The battle then begins. Kouyou uses the power of his flame to trap Ryohei in a twister of leaves that is able to cut the enemy like knives. Ryohei is unable to move and Kouyou starts attacking him from the outside, breaking his nose in the process. Ryohei is thrown out of the twister and begins to fall to the ground. However, he is able to use his flames to balance himself and land on his feet. Reborn then notices Ryohei's Bangle lighting up with flames. Ryohei charges but is unable to hit Kouyou, who continues to overpower him with punches that can't be seen by the naked eye. Kouyou then attacks Ryohei one more time and sends him flying towards the barb vine ring. As Ryohei stand up, Kouyou charges at him again but is surprised to see Ryohei's bangle's flame lighting up and Ryohei apologizing for keeping him waiting...
*Note: Bold + Italicized = First Appearance