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Shin Sol-i isn't shy about her unrequited crush on Cha Heon, her next-door neighbor. One day, she gets an idea to write him the perfect love letter.
So Joo-yeon
Shin Sol-i
Kim Yo-han
Cha Heon
Yeo Hoi-hyeon
Woo Dae-sung
Jo Hye-joo
Kang Ha-Young
Jung Jae-Oh
Jung Jin-hwan
Park Ji-won
Oh Hee-Ji
Kim Dong-Kyu
Wang Se-Hyeong
Choi Bo-min
Na Mi Nyeo
Yoo Ji-Yeon
Lee Su-Jin
Ji Hwa-seop
Lee Joo Hwan
Seong Hye-Min
Moon Sook Hee
Kim Sung-gon
Teacher Cho
Kim So-min
Mi-nyeo, Se-hyeong's son