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Deleted previous answer. You can always look at the edit history if you want to see it again. :) Is this the scene when the piano bit plays for a while? If it is then it is actually part of the ending song. I am not too sure why they decided to play it at that moment before the ending song but I am fairly certain it's part of the ending song. FYI ;): If ...


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You're most likely looking for 恋は切なく (Koi Wa Setsunaku, Love is Painful), track 15 of OST 1: https://www.youtube.com/watch?v=8NL-HCA67v0


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