Furuya-sensei wa An-chan no Mono

He got crushed when he proposed at a cafe and even cried in public. He never even kissed the person he proposed to, nor was she aware that he's her boyfriend. An immediately saw a disappointing side of Furuya-sensei (even though he's handsome) but still fell in love to him. She's trying her best to pursue him, and even though he's a good-for-nothing, his guard is unexpectedly tough.