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"First muscle training animation ever," a 16-year-old girl named Hinako leads exercises in push-ups, sit-ups, and squats. Hinako was once a human, but she was turned into an anime character when she was a second-year middle-school student.
(Source: Anime News Network)
Issho ni Training: Training with Hinako
TV·1 ep·★ 4.2

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Graduation has come and gone and now the teachers look forward to a well-deserved vacation with their new boyfriends. Unfortunately, things rarely go according to plan when their hotel doesn’t have enough rooms for everyone. As half the group splits up in search of alternative arrangements, Chizuru
Why the hell are you here, Teacher!?: Thirteenth Period
TV·1 ep·★ 6.6

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13th episode included in the BD release.
Yua is asked to model an illustrator's designs as a costume for a photo collection the illustrator is producing. Concerned for Yua, Ren offers to accompany Yua to the photoshoot, and Homi somehow ends up rehearsing the photoshoot with Ren and Yua as models
Miru Tights: Cosplay Satsuei Tights
TV·1 ep·★ 6.2