My Beloved Uma Musume Picture Book Author was a Hero

She is a picture book author under the pen name "Yoneda Okome", she is the former G1 Uma Musume Rice Shower. One day, she met an active Tracen student topple over due to her abnormal breathing named Kisera Crisis. This chance encounter is what caused the revelation of the Mysterious Man's Plans. And what of the secret of Kisera's Past? Will Rice Shower be a Hero than uncover all of these secrets!?