Far away from the city center in the south, there is a dessert shop called "Yesterday's Sunny Sky". The shop owner is a girl who has just turned 22. She is relatively introverted and her only favorite thing is making cakes. She runs this cake shop with her brother and lives a quiet and comfortable life. Until one day, her best friend took her to a fan event, and her life was disrupted...
Concept: As time goes by, the situation changes, but what remains unchanged is cause and effect.