A girl with a rare growth disorder that leaves her in the body of a child at the age of 19 meets a boy with a mental disorder who has the mind of a small boy in a 17 year old form. 'The Friendly Winter' shares with us the endearing story of their day-to-day lives, joys and tribulations.

Note: The author has split the storyline into seasons. The volume number represents the season number.

Zaburzenie wzrostu, na które cierpi 19 letnia Han Da-Jeong sprawia, że wiele osób ma ją za dziecko. Podczas próby dobrania na siebie ubrań spotyka 17 letniego Kim Min-Seonga, którego zaburzenie psychiczne uniemożliwia mu zachowywanie się w taki sposób, w jaki powinna zachowywać się osoba w jego wieku. Mentalnie ciągle jest małym dzieckiem. The Friendly Winter opowiada o przygodach tej dwójki, ich wzlotach i upadkach.

Uma garota de 19 anos com uma doença rara de crescimento que à deixa no corpo de uma criança de 9 anos e um garoto com uma doença mental que o faz ter a mente de uma criança mesmo tendo 17 anos. Esse é uma historia cativante que conta o dia-a-dia, as alegria e tribulações de um amistoso inverno.