It's precisely because of these day and night thoughts that her sleep has become increasingly shallow, and the quality of her sleep has worsened. During the worst year, she relied on sleeping pills to fall asleep, and her physical condition deteriorated to the extreme.
If it weren't for seeing her eighteen-year-old photo in her second brother's wallet today, she might never have remembered these things, as she rejects these bitter past memories from the bottom of her heart, which make her look so pathetic.
But perhaps her second brother has forgotten that she once wrote him a love letter?
Otherwise, when she returned to City C five years later, her second brother never mentioned this matter or gave her any explanation about why he never responded to that letter.
But it's fine if he forgot, as now there's no awkwardness in them being like siblings. If not lovers, at least they can be like siblings.
