Owen Chamomile, a 17-year-old, has fallen into a comfortable routine of reading and napping at home, essentially becoming a NEET. His brother, Jodale, finally puts his foot down after discovering Owen's unkept room. Jodale insists Owen get a job at the newly opened Oolong Cafe, forbidding him from returning to their residence until he's turned his life around. Reluctantly, Owen agrees.
At the cafe, Owen attempts to blend in and focus on his work. However, his plans are quickly derailed by Brioche Onare, a clumsy but well-meaning barista. Brioche possesses an insatiable curiosity, believing that even the smallest anomaly in the cafe could lead to disaster. Driven by this fear, she constantly seeks Owen's help in deciphering the cafe's mundane mysteries. Despite his desire to simply do his job, Owen finds himself drawn into Brioche's world, dedicating part of each day to solving the quirky puzzles she presents.
