Reborn as a guardian, she promised her best friend to keep him safe throughout his life.
But seeing him being hurt again and again by his fake "beloved", she felt so distressed that she lost control.
The love in her heart grew crazily, but her reason reminded her over and over again: she cannot love, should not love, and is not allowed to love.
This companionship that started as a promise eventually turned into her own, extremely sad secret love.
And the truth was far more cruel than she imagined.
