Mika didn't believe in love because of her father, so she came to Thailand with full of sadness to find her mother. The mother who regained a happy family made her view of love shaken. The gentle and open-minded stepfather gave him the fatherly love he lacked. The silent but gentle brother led her through the most beautiful summer. . . . . . Summer is over, it's time for her to go back, but what is it that makes her unable to let go?