Responses
The first one - http://www.mangago.me/read-manga/keyring_lock/
Sorry, don't know about the other (/ω＼)
i think no.2 is Happy Ending?
http://www.mangago.me/read-manga/happy_ending/
Yes, that's it. Thank you all!!
Please help me find these manga
1. Man fainted on the street, picked up by a guy who is an author but he only able to write if he locks up someone in his house. His editor later came and told MC that the author also asked him if he could lock him up but he refused
2. A man locked another man because of his premonition that the world is ending. At the end, both of them are watching their last sunset on the earth from the balcony