Too Kyo Games and Media.Vision released The Hundred Line -Last Defense Academy- on 24 April 2025 for Switch and PC, with Kazutaka Kodaka and Kotaro Uchikoshi writing and Aniplex publishing. Takumi Sumino is pulled out of the Tokyo Residential Complex into a school ringed by fire, where fifteen students form the Special Defense Unit and hold the building for 100 days against School Invaders. Story days alternate with grid based battles, and the choices you make across those days fork the run into 21 routes and just over 100 endings.
Boss fights are where The Hundred Line -Last Defense Academy- tests everything you've learned. This guide covers strategies for bosses across all areas, organized by progression order. For general combat techniques, see our combat guide.
Boss Difficulty Overview
| Area | Difficulty | Recommended Build | Key Equipment |
|---|---|---|---|
| School area | Easy | Hiruko Shizuhara | Special Move |
| Desert area | Moderate | Hiruko Shizuhara | Special Move |
| Forest area | Hard | Takumi Sumino | Hemoanima katana |
| Underground area | Very Hard | Takumi Sumino | Hemoanima katana |
| Coast area | Extreme | Takumi Sumino | Hemoanima katana |
School area Bosses
Area difficulty: Easy Recommended level: Available from the first exploration day Recommended build: Hiruko Shizuhara with Special Move
Strategy
The first bosses teach core combat mechanics. Focus on learning patterns rather than dealing damage. Each player phase gives the whole squad one pool of attack points rather than one action each, and the player team always moves first. This is your primary tool here.
Key tips:
- Don't rush. Learn the attack patterns first.
- Use Shared AP pool with rollover to create safe windows.
- Special Move is enough to handle everything here.
Desert area Bosses
Area difficulty: Moderate Recommended level: Needs a level 2 Fire Extinguisher Recommended build: Hiruko Shizuhara with Special Move
Strategy
Early game bosses test your understanding of Voltage meter capped at 300 percent. Players who skipped learning this mechanic will hit a wall here.
Key tips:
- Voltage meter capped at 300 percent is critical for these fights.
- Farm Special Move upgrades if you're struggling.
- Consider switching to Hiruko Shizuhara if your current setup isn't working.
Forest area Bosses
Area difficulty: Hard Recommended level: Needs a level 2 Fire Extinguisher Recommended build: Takumi Sumino with Hemoanima katana
Strategy
Mid-game bosses are the major skill check. They combine multiple mechanics and punish players who rely on a single strategy.
Key tips:
- You need both Shared AP pool with rollover and Hemoanima Special Moves mastery.
- Hemoanima katana makes a significant difference. Get it before attempting these.
- See our combat guide for advanced techniques.
Underground area Bosses
Area difficulty: Very Hard Recommended level: Needs a level 3 Fire Extinguisher Recommended build: Takumi Sumino with Hemoanima katana
Strategy
Late-game bosses are serious challenges. Build optimization matters as much as mechanical skill.
Key tips:
- Make sure your build is fully optimized.
- Hemoanima katana at max upgrade is recommended.
- Study each boss's attack patterns. Most have 2-3 phases.
Coast area Bosses
Area difficulty: Extreme Recommended level: Needs a level 3 Fire Extinguisher Recommended build: Takumi Sumino with Hemoanima katana
Strategy
Endgame bosses are the ultimate test. They require mastery of all combat systems and an optimized build.
Key tips:
- Top-tier build with best-in-slot gear is mandatory.
- Master every mechanic. See our combat guide.
- These fights reward patience and pattern recognition above all else.
General Boss Tips
- Learn before you fight: Spend your first attempt observing attack patterns. Don't try to win on attempt one.
- Match your build: Some bosses favor certain builds over others. Don't be afraid to switch.
- Upgrade your equipment: A max-upgraded Hemoanima katana trivializes fights that seem impossible with weaker gear.
- Use Shared AP pool with rollover: The core combat mechanic is your best defensive tool in every boss fight.
- Check the walkthrough: Our walkthrough tells you when you're ready for each boss.
More The Hundred Line -Last Defense Academy- Guides
- The Hundred Line -Last Defense Academy- The Hundred Line -Last Defense Academy- Overview
- The Hundred Line -Last Defense Academy- Best Builds
- The Hundred Line -Last Defense Academy- Tier List
- The Hundred Line -Last Defense Academy- Walkthrough
- The Hundred Line -Last Defense Academy- Beginner's Guide
- The Hundred Line -Last Defense Academy- Tips & Tricks
- The Hundred Line -Last Defense Academy- Weapons Guide
- The Hundred Line -Last Defense Academy- Combat Guide
- The Hundred Line -Last Defense Academy- Maps & Locations
- The Hundred Line -Last Defense Academy- Crafting Guide
- The Hundred Line -Last Defense Academy- Classes & Characters
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