Also if you like documentaries in the same vein as the one you recommended, you might wanna watch: http://mydramalist.com/14210-with-or-without-you
Maggi and Chunhee lived for 45 years under one roof as wives of one man. Now they are old and approaching the end of their extraordinary intertwined lives. Maggi, a 88-year-old woman, is in big trouble. She gets older and weaker every day and must prepare Chunhee. The film follows the two women during their daily life in the Korean countryside. It intensively captures their intimate and very special relationship, one in which they share night and day side by side. It is not always an easy life, but it is always marked by deep respect and love and the extraordinary humor of both of them. The director Hyuckjee Park has been working on this feature documentary since 2011, visiting the two women regularly and documenting the increasing challenges in their shared life as they become ever older. http://mydramalist.com/15003-somboon
This documentary depicts the astonishing love between grandpa Somboon and grandma Miad. Somboon was born in Ayutthaya around the period of WWII to a farmer family. Miad was his senior when they were in elementary. They later got married and although the marriage was done on suggestion of the elders in their families, Somboon never fails to be an amazing husband all these 45 years. Even now Miad is sick with kidney disease and can no longer help herself, he not only never leaves her but devotes himself in taking care of her, being both a nurse and a caring husband at the same time. http://mydramalist.com/7577-planet-of-snail
About halfway through the film, Young-chan and Soon-ho, the married couple at the center of “Planet of Snail,” need to change an overhead fluorescent bulb in their bedroom. This task poses logistical problems for them that few of us can imagine. Soon-ho is a tiny, gnomelike person with a spinal deformity, probably less than 4 feet tall. Young-chan is a long-limbed, lanky fellow with the distracted air of an intellectual; he’s easily tall enough to reach the light fixture, but he can neither see nor hear. Between them they eventually manage to get the bulb changed, with no major mishaps. It takes quite a while, since every time Young-chan gets something wrong — a cord is in the way, or the bulb is incorrectly mounted — Soon-ho must tug on his sleeve so he’ll lower himself enough for her to offer advice by tapping on the backs of his fingers, using a system known as finger Braille or tactile sign language. They never, however, resort to the cursing or impatience or constant distraction that might attend you or me trying to do the same task much more quickly.
2 
http://www.kikujiro-movie.com/
http://eiga.com/movie/84629/
http://www.cinematoday.jp/movie/T0021584
http://www.imdb.com/title/tt5791358/
http://www.johnnys-net.jp/page?id=movie&artist=32&lang=en_us
http://hikariwo.tokyo/
https://www.facebook.com/hikariwo/
http://eiga.com/movie/85304/
http://www.cinematoday.jp/movie/T0021231
http://www.imdb.com/title/tt5863362/
Takuro Takahashi
Azusa Inamura
Kiichi Sonobe
http://legacytime.p-kraft.com/
http://eiga.com/movie/85440/
http://www.cinematoday.jp/movie/T0021477
http://www.cinematoday.jp/movie/T0021409
http://eiga.com/movie/83307/
http://www.imdb.com/title/tt5125864/
http://ranmaru-movie.jp/
http://eiga.com/movie/85586/
https://movie.douban.com/subject/26866836/
http://movie.mtime.com/230631/
http://english.entgroup.cn/642246/
http://english.entgroup.cn/657727/
http://english.entgroup.cn/658585/
The hottest grandpa I think is the actor from this movie, right?
http://mydramalist.com/21300-the-song-of-cotton/photos
https://www.youtube.com/watch?v=6O4XmTLmtps
https://www.youtube.com/watch?v=Ge_rcmgvDyA
The boyfriend for rental trope, I saw it in the 2007 Korean drama Dal Ja's Spring, also in the K movie 'Boys Who Cried Wolf'
http://mydramalist.com/1116-dal-jas-spring
http://mydramalist.com/18714-the-boys-who-cried-wolf
Also if you like documentaries in the same vein as the one you recommended, you might wanna watch:
http://mydramalist.com/14210-with-or-without-you
Maggi and Chunhee lived for 45 years under one roof as wives of one man. Now they are old and approaching the end of their extraordinary intertwined lives. Maggi, a 88-year-old woman, is in big trouble. She gets older and weaker every day and must prepare Chunhee. The film follows the two women during their daily life in the Korean countryside. It intensively captures their intimate and very special relationship, one in which they share night and day side by side. It is not always an easy life, but it is always marked by deep respect and love and the extraordinary humor of both of them. The director Hyuckjee Park has been working on this feature documentary since 2011, visiting the two women regularly and documenting the increasing challenges in their shared life as they become ever older.
http://mydramalist.com/15003-somboon
This documentary depicts the astonishing love between grandpa Somboon and grandma Miad. Somboon was born in Ayutthaya around the period of WWII to a farmer family. Miad was his senior when they were in elementary. They later got married and although the marriage was done on suggestion of the elders in their families, Somboon never fails to be an amazing husband all these 45 years. Even now Miad is sick with kidney disease and can no longer help herself, he not only never leaves her but devotes himself in taking care of her, being both a nurse and a caring husband at the same time.
http://mydramalist.com/7577-planet-of-snail
About halfway through the film, Young-chan and Soon-ho, the married couple at the center of “Planet of Snail,” need to change an overhead fluorescent bulb in their bedroom. This task poses logistical problems for them that few of us can imagine. Soon-ho is a tiny, gnomelike person with a spinal deformity, probably less than 4 feet tall. Young-chan is a long-limbed, lanky fellow with the distracted air of an intellectual; he’s easily tall enough to reach the light fixture, but he can neither see nor hear. Between them they eventually manage to get the bulb changed, with no major mishaps. It takes quite a while, since every time Young-chan gets something wrong — a cord is in the way, or the bulb is incorrectly mounted — Soon-ho must tug on his sleeve so he’ll lower himself enough for her to offer advice by tapping on the backs of his fingers, using a system known as finger Braille or tactile sign language. They never, however, resort to the cursing or impatience or constant distraction that might attend you or me trying to do the same task much more quickly.
More good documentaries featuring senior citizens:
http://mydramalist.com/10431-splendid-but-sad-days
http://mydramalist.com/5274-my-heart-is-not-broken-yet
http://mydramalist.com/10343-old-partner
http://mydramalist.com/4039-mother-2012
http://mydramalist.com/20562-dear-grandma
http://mydramalist.com/16058-where-is-my-son
http://mydramalist.com/21716-karayuki-san-the-making-of-a-prostitute
http://eiga.com/movie/86012/
http://polimar.jp/
China- 16 December 2016
USA- 23 December 2016
Singapore- 5 January 2017
TRAILER:
https://www.youtube.com/watch?v=PUsEp2OaWd8
https://www.youtube.com/watch?v=3uoQFIeAPHg
https://www.youtube.com/watch?v=XFNeamCClNc
https://www.youtube.com/watch?v=90hQ9wj8WNc
https://www.youtube.com/watch?v=GNombV3D7Yo
http://movie.mtime.com/208911/
https://movie.douban.com/subject/24751763/
http://www.imdb.com/title/tt4623812/
http://chinesemov.com/2016/The-Wasted-Times.html
https://movie.douban.com/subject/26314509/
FULL RAW: http://hdfree.se/watch-online/see-you-tomorrow
TRAILER: https://www.youtube.com/watch?v=2uG-lHaBbpU
Tony Leung and Li Yu Chun sing “Ten Years”: https://www.youtube.com/watch?v=4wArqRGRZNQ
Lu Han also sings “Let Me Stay By Your Side”: https://www.youtube.com/watch?v=udn1WetSmM4