Stubborn
One thing which was evident in Usagi-san's character was stubbornness. He kept chasing after nii-san even though he knew he had a girlfriend, he kept sexually harassing me even though I was against it, he always did what he wanted and one of the reasons behind all them was his stubbornness.
It took me quite a long time to understand my feelings towards me, though I didn't really know why I began to love him as whenever I used to think of him, I never found any positive sign in him. As for me, he said I was first one, to whom he ever showed his tears and I was the one to look into his heart and I believed that that were the only reasons but after so many days of living together I found a new reason….
The key to a stubborn heart was love….
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Yeah this idea emerged because I realized then I was only nine years old that I was stubborn for which a lot of good and bad things have happened in my life.