The Way of Becoming Prétear.
Hayate tests Himeno of her worthiness by her using a kendama, however she fails at the attempt and causes a disappointed Hayate to leave. Sasame later shows her how a kendama can help increase concentration skills. Go, after merging into her, trains Himeno to use fire powers in combat. Even when Hayate seems impressed after her training, he still shows hostility towards her, causing her to accidentally say that she does not need him anymore. Himeno, after sensing a bicycle demon nearby, allows Go to merge into her and uses a fire ax to defeat the bicycle demon, thanks to Hayate.