Ruelle Louise is an ordinary girl with an interest in many things. She’s always eager to learn, try new experiences, and keep herself busy with whatever captures her curiosity.

One day, she receives an unexpected email from the CSG Company. To her surprise, she has been selected for a Planetarium Journey.

In the blink of an eye, she finds herself in a room filled with people from various realms—some familiar, others completely unknown. As she scans the room, she spots Renji and Kenji, the developers of the project, standing among the crowd. Her gaze then drifts toward a massive screen mounted on the wall, accompanied by a snack counter showcasing an array of elegant pastries, coffee, and tea.

Unable to resist the temptation, she approaches the snack counter—only to encounter a girl with the tag “AET” on her name badge. Ruelle takes a seat beside her, and they strike up a brief conversation about finding their assigned teams based on their tags.

"I think I’m in the snacks team," June says, pointing at her tag. "See? It says 'EAT.'"

Ruelle nods thoughtfully, taking a bite of her croissant. Her own tag reads "LABREH", and after rearranging the letters, she realizes it spells "HERBAL"—which doesn’t seem to fit into any food category. After bidding June farewell, she sets off to find her teammates.

As she wanders the room, she comes across two girls named Julie and Mariean, who introduce themselves as Hibiscus and Chamomile. Seeing their connection to plants, Ruelle wonders if her "herbal" tag means she belongs to the same group.

Their small team of three soon expands when they meet Shun and Floryska, who have tags reading "Oolong" and "Green"—identifying themselves as part of a tea team. It turns out that herbal, hibiscus, and chamomile all belong to a larger category: Tea. Excited by this discovery, they decide to merge into one team.

However, they are still missing one final member. Looking around the room, Ruelle suddenly remembers June—the girl she met earlier. Her tag, "AET", could be rearranged to spell "TEA". She’s the missing piece!

With their team finally complete, they enter their keywords into the system.