He had not perfected it and from what Hinata made of it , Naruto continued to turn into the Kyuubi from sheer over-use of Chakra
![(AC2) [Heikou Sekai (Kayou Arisa)] Mona No Mora Kasegi Sex (Genshin Impact)](https://img.hentai2.net/uploads/3846/384609/poster.jpg "(AC2) [Heikou Sekai (Kayou Arisa)] Mona No Mora Kasegi Sex (Genshin Impact)")
He had not perfected it and from what Hinata made of it , Naruto continued to turn into the Kyuubi from sheer over-use of Chakra