Users can send gratitude letters to show appreciation. Inspired by the "5 Love Languages," this feature streamlines the process with pre-defined actions, helping users identify their feelings.

Each letter is a delightful surprise. Users can revisit moments in their Notebook, which provides a space for reflection. This encourages users to consider what their partner values most and fosters deeper understanding.

Users buy items with fish points earned from gratitude letters. Based on Yukai Chou’s gamification framework Octalysis, this system lets them collect virtual goods, creating a personalized collection.

Caring for your cat is the ultimate goal! The items you buy from the shop can boost your cat’s happiness, which declines without regular attention. Referring back to Octalysis, the motivation to keep your cat happy drives users to engage in consistent appreciation.