Episode 4 Details Casts Videos Posters Season Lists Title Episode 4 Genres Comedy Drama Release Date 2017-01-05 Episode Runtime 00 Hours 23 Minutes Season Number 1 Episode Number 4 Production Companies Unknown Lee Gi-kwang... Lee Ki Kwang... Lee Da-in... Kim Hye Rim... Kang Tae-oh... Drunk Sunbae... Kim Dong Seok... Kim Tae Woo... Kim Hye-ji... Ga Young... 20 years old | you are my summer love ♥ Korean drama (Trailer) Original Size (500x750) Original Size (599x910) Season 1 4 Episode(s) 2014-01-06