Aishite Kudasai, Sensei summary:

From Midnight Scans:Kitou Hijiri, a student, confessed his feelings to a Chemistry teacher named Nakatani Ayano whom he had fallen in love with 8 years ago. Somehow when he was young, he lived beside Ayano and bear feelings for her. Ayano, in turn, could not resist Hijiri’s determination and strong feelings towards her. What will be the ending of their taboo love?