Cast: AKATSUKI Senri

Lux, who was a prince from the Empire that was destroyed five years ago due to the revolt, met with the princess of the new Kingdom, Lizsharte, by accidentally breaking into the bathroom of the girl's dormitory. "......How long are you planning to stare at my body, you fooooool!" The ancient weapons found from the ruins, the Drag-Ride. Lux who was called the strongest Drag-Knight in the past was now known as the "Weakest Undefeated", a Drag-Knight who doesn't attack at all. After the duel that started by the challenge from Lizsharte, Lux ended up entering the girls' school that raised Drag-Knights......! Lux's story where he is surrounded by the noble girls from the academy is about to unfold. The "ultimate" academy fantasy battle where the right and the might cross passes now begins!

There's a new wheel-chair bound student at school who has returned after an illness, and she immediately kisses Tsuzuki Ui, who she calls "Rei-kun." He soon deduces that she is a daughter of a wealthy family, and a person he once beat at an internet murder mystery game. She is apparently fixated on him, since he was the only one who ever beat her, and she has now come to see him in person. Her plan is to have a real-life murder mystery game, and her current focus is on the supposed suicide of Tsuzuki's father. For some reason, she suspects his little sister Haruka...