When paired with "Kurohomura," the phrase "Extra Quality" is likely a descriptive addition, not an official game feature. It probably refers to the high standard of the specific release, perhaps indicating:
Naruto: The Cursed Jutsu [v0.5.1] is a fan-made erotic visual novel developed using the Ren'Py engine naruto the cursed jutsu v051 kurohomura s extra quality
Several new Jutsu have been added that focus on "Kurohomura" (Black Flame) aesthetics, offering high-risk, high-reward gameplay. Why the Community is Buzzing When paired with "Kurohomura," the phrase "Extra Quality"
The origins of Kurohomura are shrouded in mystery, with little information available about its creation or the identity of its creator. However, it is believed to have been developed by a powerful and reclusive shinobi who sought to harness the dark energies of the universe to create an unstoppable technique. When paired with "Kurohomura