A dark-anime battle arena where every correct sudoku move lands a strike, every mistake bleeds your HP, and your 3-waifu squad chains devastating Bursts to break the boss.

Correct numbers deal damage scaled by your squad. Mistakes cost 20% HP. Five strikes and it's over.
Burst I supports, Burst II defends, Burst III destroys. Each waifu has a unique active skill.
Build the burst gauge with correct moves, then unleash a heal → reveal → 5× damage cascade.