After a dead end in their investigation of the local fox goddess, an attempted abduction and chase through the city, and news of a fire at the video arcade, Jun, Riko, Yuuji, and Aoi have had a rough time. A new series of school challenges to win MarduKoins seems like just the thing to give them some fresh motivation, as they team up to prove their academic and physical skill - and upgrade their MarduKard decks. As the challenges go on, however, they find some unexpected opposition... and begin to uncover some dark happenings in town. With more on the line than winning a contest, can Riko and Jun outfox their enemies? The second volume of kawaiiNihongo's Light Novel features a deeper look into what is happening in the world where thousands of people already learn Japanese.