Young love sprouts quietly. What is it like? Did you know? Sister, I am really jealous of anyone who was with you before. Why, you chose all the bad people except me who likes you the most.
Don't like it? But we are not biological sisters. Why can't they do it but I can't? Tell me why.
Sister, I understand you. You look like there is no liking in her eyes at all, so sister, can't you look at me? Why can't you look at me.
Sister, you said that we were sisters from the moment I was adopted, but I really don't want to be your sister.
Concept: A secret crush in youth, a hidden love, a love known to everyone passing by.