Infinite Breakthrough

The protagonist, Tsurugi Nao, works tirelessly for her sick family. However, due to her foolishly honest nature, she spends her days without things going her way. One day, she is stabbed to death by a malicious customer at her workplace. When she opens her eyes again, she finds herself in an amusement park she has never seen before. Listening to the people around her, she learns that they have all experienced death at least once, just like her. Just as she is worrying about her family left behind, a quest start screen suddenly appears in the sky. It seems that clearing the quest will allow her to return alive. However, the condition for clearing it is to defeat a boss monster capable of killing a human instantly...