Enyoku (2007) Adult Anime Review

Mizuho Awashika, an English teacher, strongly desired to have a relationship with Naria Kusumoto, who was a student of hers. She had an intense desire that was beginning to take hold of her every thought. One day, Mizuho finally began to take action on her feelings and seduced Naria in her office. That action set her on a forbidden course that would take both Mizuho and Naria to the heights of pleasure. But Mizuho has one obstacle in her way—Yukiha, a girl from her school that may have similar feelings for Naria. Who knows what happens from here as pent-up lust comes to the surface…