Under an energetic star, the doors to people’s hearts are opening.

One August, under a crescent moon, a beautiful envoy of Neptune named Sara visits The Full Moon Coffee Shop. Sara’s special talent is giving people dreams and helping them to open their hearts.

Satsuki (from Book One) returns to The Full Moon Coffee Shop. She ran away from home and only returned three years later. When she decides to introduce her new boyfriend to her mother, she unexpectedly learns the truth about her mother's past. Meanwhile, Fujiko is struggling to come to terms with her true feelings, while writer Futakigusa is facing creative difficultiesin the wake of an accident.

Neptune, who is believed to have a significant impact on dreams, creativity, and hidden things, also appears and has a specialreason for helping those who visit The Full Moon Coffee Shop. The story explores the concept of multiple dimensions and how they can influence each other, as well as the importance of being true to oneself and recognizing one’s own feelings. It is an intricate and thought-provoking story, weaving together different elements to create a cohesive narrative.