Makoto, an ordinary high school student, is on his way home when he notices a little girl lost in the crowded streets. She’s frantically looking for her older sister Tachinaba. Moved by her distress, Makoto gently helps her search, reassuring her that everything will be okay.
When Tachinaba finally finds them, she's deeply grateful to Makoto for comforting and guiding her sister back safely.
What Makoto doesn’t realize is that this small act of kindness is about to become the turning point of his high school life.