My Father Brought My Homeroom Teacher, Ms. Sannomiya, Whom I Secretly Admired, As A Remarriage Partner. Tsubaki Sannomiya

父親が再婚相手として連れてきたのは僕が密かに憧れていた担任の三宮先生だった。 三宮つばき

I've always liked my teacher. I thought about wanting to date him, but I knew it was impossible, so I kept quiet. And yet, he married my father. When I thought about him doing that sort of thing with my father... I couldn't hold back anymore.