Mahouka Koukou no Yuutousei EP7 - Arithmetic Chain

Shizuku and Shiori win their matches for the Rookie Speed Shooting event, leading to them facing off in the semi-finals. Despite Shiori's Arithmetic Chain magic sequence, which helps her in calculating faster than a supercomputer, Shizuku wins the match due to her generalized CAD (Casting Assistant Device) with auxiliary sight crafted by Tatsuya. Shizuku's Active Air Mine spell used during the said match is then registered by Tatsuya with National Magic University's database under her name instead of his despite being the developer. For the Rookie Battle Board event, Honoka wins the match by using a light magic spell developed by Tatsuya for her. Meanwhile, Shiori, still feeling depressed about losing the match, is comforted by Mizuo, telling her that Airi is not going to abandon her since she is happy to find a friendly rival through her. This motivates Shiori to rejoin Airi the following morning.