Synopsis

After seemingly defeating a dungeon boss, the boss activates an 'Unyielding Will' skill, making her invulnerable and drastically increasing her summoned monsters' power. The protagonist's party is quickly put on the defensive. One party member decides to buy time by using a combination of crystals to control the boss's summons and defend against their attacks, sacrificing himself to create an escape opportunity for the others, despite only having a short period of time before the skill runs out.