Cooperative or special mini-games specifically designed for Duo Duo and their partner to play together, building their relationship stat (e.g., dancing, cooking, or solving puzzles) [3].

Players can collect, customize, or craft letters for Duo Duo to send to their love interest. These letters could be personalized with stickers or phrases unlocked through gameplay [1].

A dedicated in-game album that stores screenshots, unlocked dialogue, and milestones in Duo Duo's relationship, allowing players to revisit heartfelt moments [2].