Kusunoki Hinami is a 21-year-old university student working a part-time job at a coffee shop. She receives a frantic phone call from her mother and understands immediately that her younger sister Hana, who has been hospitalized for four years with an unknown illness, has taken a turn for the worse. She rushes to the university hospital, where Hana is undergoing emergency surgery. While waiting, Hinami prays desperately, offering everything she has in exchange for her sister’s life. As she walks up the stairs, a voice claiming to be God speaks directly into her mind, offering to grant her wish in exchange for everything she possesses. Hinami accepts without hesitation. Hana’s surgery concludes successfully, and the nurse confirms her sister is saved. In that moment of relief, Hinami suddenly finds herself engulfed in absolute darkness. The voice from before appears before her as a handsome young man with chestnut hair and jewel-like eyes, introducing himself as the God Rigris. He explains that as the cost of saving Hana, Hinami will become his toy, sent to another world called Letisriel to collect points for his amusement. The world consists of three continents—Saliton, Mushbar, and Agudis—and is inhabited by humans, beastkin, and spirits, along with dangerous monsters. Hinami’s task is to gather points through her actions; in return, Rigris will send her appropriate rewards, though he refuses to disclose the true purpose of the collection. To give her a chance at survival, Rigris converts her past experience from age thirteen to twenty-one into stats, reverting her body to a thirteen-year-old form. Her status now shows increased health, mana, and luck, along with two new skills: God’s Garden, which creates a protected sanctuary around her home, and Violet Light Rhapsody, which summons a Light Spirit shield when she sings with heartfelt emotion. She also receives the title Blessing of God Rigris, which allows her to exchange a diary with Rigris for communication in the unknown world. Rigris has already built a house for her in a low-difficulty forest near a town, and the area within the fence will be recognized as her safe haven under God’s Garden protection. Hinami, though initially overwhelmed, accepts her new fate with gratitude. She has no means of attack but decides to rely on her singing ability and the granted skills. As she prepares to be transported to Letisriel, she feels that despite the harsh exchange, Rigris’s care and the promise of a new beginning leave her more fortunate than she expected. Her ultimate goal is to survive, collect points for the God, and somehow find a way to live in this foreign world, forever bound by the deal that saved her sister’s life.