Fushigi Yugi - Episode 14: Wolf in the Fortress
https://www.crunchyroll.com/fushigi-yugi/episode-14-wolf-in-the-fortress-695055 A short scene with Miaka Yuki in boxing attire.
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D.C.: Da Capo - Episode 2: The Explosive Anti-Nemu
Mako Mizukoshi has a short boxing match fantasy sequence with Suginami. Only punches thrown by Mako.
Murenase! Seton Gakuen - Episode 12: The Animal Students I Know
https://www.crunchyroll.com/seton-academy-join-the-pack/episode-12-the-animal-students-i-know-792525 Ranka Okami fights Koorimoto Man in a boxing match to rescue Hitomi Hino. Ranka takes all the punches and wins when Koorimoto's feelings are hurt. Mostly played off for comedy.
Help Finding "Nurse Witch Komugi" Episode
I know where the characters are from, but I'm not sure which season or episode. Help?
Duncanville - Season 1, Episode 3: Undacuva Mutha
Annie lets off some steam from a hard day at work by working the pads.
Kirameki Inokori Daisenso - Shinra-Banshou (Animated Music Video)
https://www.youtube.com/watch?v=pMXRWurZenY The two animated singers have a short boxing sequence.