The best aunt and niece love story.

未来 fell in love with her aunt at first sight and, through six years of unwavering effort, won her own happiness.
沙織 went from loving the sister to loving 未来 as a person. Perhaps she initially sought her sister's shadow in 未来, but the moment she tore up that unsent letter meant for her sister, it proved she had truly fallen for 未来.
I truly hope they can be together in the end and find happiness.