Saisoku Musou no B-kyuu Mahou Tsukai: Ippatsu Utareru Mae ni Senpatsu Uchikaesu!

In a world where worth is measured solely by the capacity of one's mana pool, Sky's fate was sealed at birth. Born into nobility yet cursed with a reserve of only five units, he is deemed a failure by his own family, a disgrace to their prestigious lineage. Cast aside and branded an outcast, his future as a mage appears all but over—until a chance encounter with a mysterious sorcerer named Ans changes everything. Ans imparts a philosophy that shatters the world's conventional wisdom: true power does not lie in the sheer volume of one's magical energy, but in the speed at which it can be unleashed. While Sky's mana is pitiful, his reflexes are extraordinary, and under Ans's unconventional tutelage, he discovers an innate talent for rapid-fire spellcasting. Armed with this newfound perspective, the disgraced dropout rejects his label of mediocrity and sets out to overturn the established order. Now, Sky is determined to prove that even the weakest reservoir can become the deadliest weapon, embarking on a journey to rewrite his destiny and reclaim his honor through sheer velocity.