Today is the birthday of Mako Shirakabe, Celebrity Tea. A great chance for her to be celebrated by many people as she lives with her friends at her Takako-so. However, for some reason, she can't say that today is her birthday. Due to the frustrating situation that she can't bring up directly, Mako unintentionally acts strangely. Looking at her like that, there was another person who was acting suspiciously in the same way.