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After monsters overrun his home, Takumi and 14 students defend an isolated academy for 100 days through tactical battles and branching choices.
Released 23 Apr 2025
Defend for 100 Days
Branch Into 100 Endings
Fight on Tactical Grids
Kazutaka Kodaka and Kotaro Uchikoshi join forces for the first time to deliver the ULTIMATE adventure game! 15 students are tasked with defending a school from grotesque monsters for 100 days. Can they make it to the end? And will they survive long enough to uncover the truth?
Developed by Too Kyo Games, Media.Vision Inc. · Published by Aniplex Inc.







Takumi Sumino’s ordinary life ends when grotesque invaders attack his town. He and 14 other students are taken to Last Defense Academy and tasked with protecting it for 100 days.
When invaders attack, command the students in turn-based, grid-based battles to defend the academy. Each student has unique skills, and battles unfold across waves of enemies.
Between battles, spend time with classmates or explore the wilderness and ruins for supplies. Use resources to craft gifts, strengthen bonds, and develop the team as choices lead into branching routes and multiple endings.
Players who enjoy the game often praise its sprawling branching story, memorable characters, and dramatic shifts in tone, saying the strongest routes and revelations reward a substantial time investment. Some also enjoy the tactical battles and presentation. Reviews are sharply divided, with recurring criticism of the long, repetitive structure, uneven routes, and battles that can become monotonous.
Takumi Sumino is a totally average teenager living in the Tokyo Residential Complex, a place where every day is much like the last and nothing bad ever happens. All that changes when freakish monsters attack the town and start wreaking havoc. A strange creature calling himself Sirei appears and offers Takumi the power to protect those he holds dear... All he has to do is stab himself in the chest!
The next thing he knows, Takumi is in Last Defense Academy, a school in the middle of nowhere surrounded by a wall of otherworldly flames. He and 14 other students have been drafted into the Special Defense Unit, a team tasked with keeping the school safe for the next 100 days. How much are they willing to sacrifice to take back their normal lives and save the world from the grotesque school invaders?
The curtain rises on 100 days of war and despair...
Takumi's choices will decide his future, but there's no telling what kind of consequences these decisions might have...
When the invaders attack, it's up to you to protect the school in SRPG battles.
Use each student's unique Specialist Skills to turn the tide of battle in your favor!
Spend time with your teammates to deepen your bonds, or explore the wilderness and ruins outside the school.
You can even use the items you find to craft gifts and get even closer to your allies!
| Platforms | Windows |
|---|---|
| Achievements | 47 |
| Age ratings |
|
| Controller support | PlayStation, Xbox |
| Controller required | No |
| Demo | View demo on Steam |
| DLC / extras | 2 listed on Steam |
| Metacritic | 83/100 View on Metacritic |
| Website | Official website |
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