Adult PC Game: Nagiyahonpo - Time Stop RPG Wool Avanture - Final Archive

Five years ago... Monsters who have the ability to stop time are now invincible.
Man surrendered and the long battle between monsters and humans ended. It meant that man would be a slave to a monster.
The town of departure.
Merrill, a female swordsman who lives in the town, learns that his sister is a monster sacrifice.
Merrill dared to stand up in a world dominated by such monsters.​