It's about this angelic being [called Ii] with one wing born into a world where all children are born as twins, with one wing each. She has neither twin nor matching wing, and so sends out a song into the cosmos, hoping that if she does have a twin somewhere out there, they will answer. She then cocoons herself, to purify, and when she wakes up she finds seven beings--six of them are in sets of twins, but the seventh, Gen, is alone. They all end up living together, and Ii and Gen slowly grow in love.
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Quote:
"A memory is something that has to be consciously recalled, right? But it's different from a memory locked deep within your heart. Words aren't the only way to tell someone how you feel...As long as I'm with you, as long as you're by my side, I won't give up even if I'm scared." Tifa Lockheart, Final Fantasy VII