Mama x Kano+ ~Oshiego no Okaa-san ga Ecchi na Sensei de, Musume mo Ecchi ni Nattara Dame Desu ka?~

After finally achieving his dream of becoming a teacher at his alma mater, the protagonist reunites with two pairs of mothers and daughters.
His former teacher, Sawako, and her daughter, Ayumi.
His student, Yuna, and her mother, Ritsu.
Through a series of coincidences, the protagonist ends up entangled with all of them.
At Sawako’s suggestion, he decides to face the situation head-on, leading to a hectic but enjoyable school life.
—The second semester begins, and the season shifts from summer to autumn.
The school uniforms change from summer to winter attire, and suddenly, a hot spring trip is announced!
The destination? Harenchi no Yu (The Hot Springs of Shameless Love).
On top of that, the school’s biggest event, the Houka Festival, is just around the corner…

[Translated from dlsite]