Ruki: When I said, 「It's already time to say bye, I'm sorry」 to a person I liked, I felt this painful tightening in my chest as I cried.
Uruha: I broke up with a person I really liked when we got in a fight, and I frantically tried to get back with her, but it didn't work out. At that time, I didn't go to my part-time job, and I caught a cold, so I only dragged everything out with a broken heart.
Aoi: When I was returning from my parents' home to Tokyo, my parents were standing at the entrance to send me off. At that time, my heart was already leaning towards stopping and going back to them.
Kai: Even though I got broken up with, I didn't realize at all, so when the cellphone number changed all of a sudden, I was honestly really shocked.
Reita: When my sis graduated from high school and had to move into the company dorms, the day she had to move, my sister suddenly started crying and hugged me. At that time, I also started to cry, unfortunately, but...soon after that, she would leave the dorm and go back and forth between our parents' house and the dorm (laugh).

Source: michido.blogspot.com , via Tumblr