The protagonist is on a train and unknowingly speaks loudly, and she might have sounded a bit harsh. She asks herself what she did wrong. Before entering a tunnel, she says something that awkwardly darkens the window. Instead of listening to other people's conversations, she imposes her own answers. The protagonist realizes that she has been limiting her view of the world and feels as if she has been hit on the head. She finally realizes the importance of her partner's presence, which she took for granted. Someone nearby defended her when she was talked to in that way, and she realizes the importance of self-love. The protagonist and her partner get off the train without continuing the conversation and the distance between them grows. She realizes that words can hurt even if they don't want to, and she apologizes before holding her partner's hand. She feels that love is something that can be spoiled and forgiven, and she is always the one who makes mistakes in the relationship. The protagonist believes that it is natural to fill in the gaps for each other and to have empathy and kindness. Even though words hurt, she cannot be honest and she regrets being defeated in an argument. She realizes that she cannot do anything alone and that pride doesn't matter compared to being scolded by her partner. She wants her partner to scold her, even though she is the only one in the world. The protagonist realizes the importance of her partner's presence and that she never realizes how important it is. Someone nearby defended her when she was spoken to in that way, and she realizes the importance of self-love. The protagonist realizes that she cannot live without love and that this feeling is new to her as an adult. She is always gently scolded by her partner. She wants her partner to scold her, even though she is the only one in the world.
