This appears as author Kang Byeong-jun’s (Lee Ho-jae) Gapyeong residence in Romance is a Bonus Book/Romance is a Supplement/How To Publish Love (로맨스는 별책부록) (tvN, 2019), which Cha Eun-ho (Lee Jong-suk) and Kim Jae-min (Kim Tae-woo) come to a few times to visit him (as in episodes 10 and 13). [SPOILER] In final episode 16, Ji Seo-joon (Wi Ha-joon) follows Eun-ho for his first, and final visit.
Edentia Pension/Edentia Villa Pension [에덴시아별장펜션] is a holiday home in the village of Baekdun [Baekdun-ri/백둔리] in the Gapyeong County’s Buk Township [Buk-myeon/북면].
205-10 Baekgun-ro 650beon-gil, Gapyeong-gun, Gyeonggi-do, South Korea
경기 가평군 북면 백둔로650번길 205-10
(북면 백둔리 716-3)
Geolocation: 37.916166, 127.440162
— submitted by Mich KDL