Lux, a former prince of an empire named Arcadia that was overthrown via a rebellion five years earlier, accidentally trespasses in a female dormitory's bathing area, sees the kingdom's new princess Lisesharte naked, incurring her wrath. Lisesharte then challenges Lux to a Drag-Ride duel. Drag-Rides are ancient armored mechanical weapons that have been excavated from ruins all around the world. Lux used to be called the strongest Drag-Knight, but now he's known as the "undefeated weakest" Drag-Knight because he will absolutely not attack in battle. After his duel with Lisesharte, Lux ends up attending the female-only academy that trains royals to be Drag-Knights.
| Title | Time | |
|---|---|---|
| 1 | The Crimson War Princess | 2016-01-11 |
| 2 | The Weakest Drag-Knight | 2016-01-18 |
| 3 | The Lady of the North's Engagement Conditions | 2016-01-25 |
| 4 | The Sixth Ruin -Miniature Garden- | 2016-02-01 |
| 5 | A Girl's Wish | 2016-02-08 |
| 6 | The Homecoming of the Strongest | 2016-02-15 |
| 7 | A Girl's Truth | 2016-02-22 |
| 8 | Awakening of the Phantom Divine Beast | 2016-02-29 |
| 9 | The Promise | 2016-03-07 |
| 10 | The Young Girls' Reward | 2016-03-14 |
| 11 | The Imperial Assassin's Dagger | 2016-03-21 |
| 12 | The Young Girl's Cherished Desire | 2016-03-28 |
