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No no no! The older brother had fallen in love with the younger brother, and thus became an active troublemaker (example-lying to take money from their mother, and trying to see his younger brother with this excuse), whist also distancing himself from his family (living with his mum's friend, instead of living with the family). The younger brother never realized this, thus despising his older brother and thinking of him as an "embarrasment". This was the younger brother's side of the story. Also, there was no mention/sign of rape anywhere in the story.
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*whilst
I shouldn't have read Aoi's story first. My heart aches for him.