Real demo Shiawase ni Shite Kudasai ne?

High school student Machino, who longs for the 'love of destiny', encounters the dating simulation game 'Celestia'. Despite having maximized affection with all the heroines, she can't decide on just one, leading her to spend days of anguish unable to advance to the confession event. At that moment, an explosion along with a shooting star occurs in her house, and when she opens her eyes, she meets the main heroine of 'Celestia', Sofia...