Please help: looking for a manga

mermaidlily November 28, 2015 4:18 am

I am looking for a manga. the student falls in love with his teacher. he gets in trouble and the teacher asks him to write a reflection but he writes a confession instead. the teacher says to write it again because he he thinks it is just a prank. later the student sees the teacher waking with his sister in town and misunderstands that it is his girlfriend. he confronts the teacher and finds out the truth and the teacher accepts his confession.
please help me find which manga this is.

thank you very much

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