Date A Live: Rinne Utopia

A dating sim game based on the anime Date A Live.

Thirty years ago a strange phenomena called a "spacequake" devastated the center of Eurasia, claiming the lives of at least 150 million people. Since then, smaller spacequakes plague the world on an irregular basis. Itsuka Shido, a seemingly ordinary high schooler comes across a mysterious girl at the ground zero of a spacequake and learns from his sister Kotori she is one of the "Spirits" who are the real cause of the spacequakes that occur when they manifest themselves in the world. He also learns that Kotori is the captain of the airship Fraxinus, crewed by the organization Ratatoskr, and is recruited to make use of his mysterious ability to seal the Spirits' powers thus stopping them from being a threat to mankind. However, there is a catch: to seal a Spirit, he must make her fall in love with him and kiss her.

(Summary of the plot from Wikipedia)

This game introduces a new heroine named Sonogami Rinne. The only gameplay system is choosing which girl you want to talk to, and the game itself is centered on dating the heroines. Features animated CGs.