You cannot download a pre-patched game for legal reasons. However, you can buy a legitimate Japanese copy of Oregairu & Zoku for PS4 (Region-free) and apply the fan-made patch via a modified console or an emulator (like ShadPS4 or Vita3K).
Why? Likely due to niche appeal and high licensing costs. While Oregairu is massive in Japan, Western publishers worry that heavy Japanese cultural dialogue (superficial relationships, service clubs, hyper-specific social cues) is too difficult to localize profitably. oregairu visual novel english
Let’s break down the current landscape, the available fan translations, and how you can experience the genuine article. You cannot download a pre-patched game for legal reasons