Joohyun misses the boundless, infinite sweet Summers. She misses the rides through the winds, she misses the leather in between her fists, she misses the fire of her heart, she misses him. So she write letters to Oh Sehun, never intending to send them. But she has a daughter who is very adamant to bring the smile back on her mother's beautiful face so it isn't a surprise when one day, Bae Jooh