Kuizu is an AI-powered tool designed to enrich romantic relationships. It's a type of AI coaching solution, specifically crafted for couples looking to deepen their connections to one another.

The application provides users with a unique AI-driven journey that is personalized for each relationship. The key features include providing daily casual questions aimed at building stronger connections, and including interactive quizzes related to conflict resolution, sexual topics, and envisioning a shared future.

Furthermore, Kuizu facilitates an AI Advisory service that offers innovative, AI-guided relationship guidance. Another intriguing functionality is the 'Relationship Score' feature, which acts as a quantifiable measure of the users' love or connection.

However, the means by which this score is determined are not specified in the given text. All in all, Kuizu presents a futuristic approach to relationship guidance, combining technological advancements with aspects of relationship building and maintenance.