Persona-style games run on a calendar system where every day forces a choice: study for exams, hang out with a friend to deepen a social link, or dive into a cognitive dungeon to exploit enemy weaknesses with all-out attacks. Social links and confidant ranks power up persona fusions in the Velvet Room, turning your relationships into combat strength. The after-school life of friends, romance, part-time jobs, and study sessions IS the game, and dungeon deadlines create real tension.

Summer Engine helps you build the calendar loop, social link progression trees, turn-based weakness-exploitation combat, and persona fusion system through conversation. You define the cast, the daily schedule, and the shadow world. The AI scaffolds the interlocking systems that make every in-game day feel meaningful.

The magic of this format is that players create their own story through daily choices. Who they spend time with, which confidants they max, and how they balance dungeon progress against social life makes every playthrough personal.

• Writers who want to build a game around daily life, friendships, and a supernatural double life.
• Solo devs inspired by Persona 3-5 who want a calendar-driven RPG with social sim mechanics.
• Designers who love the tension between time management and dungeon exploration.
• Small teams building a life sim RPG with turn-based combat and relationship progression.

• First Semester Demo

  Build the opening month: protagonist transfer, first dungeon awakening, establish the calendar loop, and introduce 3-4 social links.

• Social Link Showcase

  Create a vertical slice with a full confidant arc (10 ranks), showing how relationship choices affect dialogue, persona fusion bonuses, and story outcomes.

• Full Calendar Year

  Develop a complete school-year RPG with seasonal events, multiple dungeon deadlines, exam weeks, and a climactic final semester.