HAIKYU!! FLY HIGH represents Garena International II's ambitious entry into the sports RPG genre, leveraging the massive popularity of the Haikyu!! anime franchise. The game positions itself as both a faithful adaptation for existing fans and an accessible volleyball simulation for newcomers, combining narrative elements with strategic team management mechanics in a mobile-friendly format. The core gameplay revolves around building and managing a volleyball team through character collection, skill development, and tactical formation adjustments. Players engage in 3D volleyball matches where timing-based quick-time events determine attack and defense outcomes. The game features an extensive story mode recreating iconic moments from the anime, complemented by original voice recordings from the Japanese cast. Additional modes include ranked matches, special events, and cooperative gameplay options that encourage long-term engagement through regular content updates. User interface design presents both strengths and challenges, with the main menu featuring multiple navigation points that some users find overwhelming initially. The 3D match presentation stands out with smooth animations and dynamic camera angles that effectively convey the intensity of volleyball matches. Real-world usage patterns show consistent daily engagement, particularly through the energy-based progression system and daily mission structure that encourages regular check-ins while limiting extended play sessions. User feedback consistently highlights the game's visual presentation and faithful adaptation of source material, though some technical issues emerge in reviews. Abolfazl Nejat's August 7th review praises the game as 'one of the most beautiful and attractive volleyball games on mobile' while noting menu complexity. Multiple reviews from early August 2025 mention account creation difficulties, with Olivia Wilson's review detailing complications with Google sign-in functionality that forced temporary guest account usage despite progress loss warnings. The application excels in delivering an authentic Haikyu!! experience with high production values and engaging core gameplay, though it faces limitations in interface clarity and sign-in reliability. Its free-to-play model with gacha mechanics provides accessibility while potentially frustrating players seeking specific characters. Ideal for anime fans seeking immersive story content and sports game enthusiasts comfortable with energy-based progression systems and tactical team management.