顔を真っ赤にして照れる過去ホシノはかわいい
相手は先生でもユメ先輩でも好きな方で妄想してね!!

The past Hoshino is cute when she blushes and gets embarrassed.
Feel free to fantasize about whether the other person is Sensei or Yume-senpai, whichever you prefer!!