Kyonyuu Hitozuma Onna Kyoushi Saimin / Hypnotized Married Teachers with Big Tits (2 episodes)

Based on the visual novel by the company Lune. The main character grew up without a mother and does not know what maternal love is. He studies at a prestigious school, but does not try very hard, so his grades, although not the worst, are much lower than his real abilities. His teacher Shirakawa Miwa notices this and tries to help the boy with his academic performance. She is kind and gentle, supports him with advice, and sometimes with the warmth of her maternal love.