Ad Aquilonem - 100 Days with Seto - is a single-player simulation and adventure game for PC in which players spend 100 days raising and bonding with a young beastfolk named Seto. The core experience centers on daily decisions that shape his abilities, personality, and combat approach ahead of a final confrontation.
Gameplay
Each day offers choices between training to build abilities, resting to restore condition, or exploring to unlock new skills. These actions directly affect Seto's growth and fighting style. Training focuses on increasing specific attributes, while rest prevents overexertion. Exploration introduces new areas and opportunities to learn techniques that combine into custom combat approaches.
Player decisions also steer Seto's personality between Wild and Cool traits. This shift alters his dialogue, reactions during events, and the overall tone of interactions. The same sequence of days can unfold differently based on the balance of training, rest, and social time spent together.
Every conversation and event features full Japanese voice acting. Small daily interactions, such as talking or playing simple games together, add layers to the relationship and reveal more about Seto's character over time.
Game Modes
The game operates as a continuous single-player raising simulation without separate multiplayer or competitive modes. The primary loop runs through 100 in-game days of structured choices. Every seventh day triggers an expedition phase where Seto faces enemies and story challenges that test the results of prior training.
Expeditions serve as the main test of developed skills, requiring players to apply learned abilities in sequence to overcome obstacles. Outcomes feed back into the raising process for the remaining days. Multiple endings branch from the cumulative choices across the full period.
Story and Character Development
The narrative begins when Seto collapses near the player's home and explains his defeat by another version of himself. The 100-day timeline builds toward a rematch. Daily interactions and training sessions drive personal growth, with personality shifts influencing how events play out and how Seto responds to the player.
Exploration events during expeditions introduce additional story beats that reflect the player's raising approach. These moments combine with everyday companion activities to create a layered experience centered on preparation and connection.
Is It Worth Playing?
This title suits players interested in character-raising simulations and choice-driven adventure stories. The system of daily training, rest, and exploration combined with personality branching and expedition tests provides a focused loop for those who enjoy guiding a single character's development over a set period.
The game remains in development with a planned 2026 release and currently has no user reviews available. Its appeal lies in the fully voiced Japanese dialogue, multiple endings tied to raising choices, and the freedom to shape combat style through skill combinations. Those seeking a narrative-focused single-player experience with measurable progression in abilities and relationships will find the core mechanics align with that preference.