Nikki UP2U: A dressing story is a mobile game developed by SuZhou Nikki Co., Ltd (now named Paper CO. China). It is the first game in the Nikki Up2U series.
The premise of Nikki UP2U is to dress up appropriately according to an occasion in the story. For instance, during the first stage Nikki wants to go out and eat, but Momo points out that she cannot walk outside in pajamas. It is the player's task to give her appropriate clothing, and once done, evaluation will take place for a duration of time. The player can do other things in the meantime. Once finished, Momo will comment and grade the result from S-F: S being spectacular, A being great, B being okay and F being outright terrible.
After each story stage, the player will be rewarded with gold, which can be used to buy new clothes. Gold and new clothing can also be acquired by completing various achievements as well.