Any prison yaoi mangas?

undergrand hotel

http://www.mangago.zone/read-manga/deadlock/
(⌒▽⌒)

http://www.mangago.zone/read-manga/deadlock/
http://www.mangago.zone/read-manga/under_grand_hotel/ +
sequel http://www.mangago.zone/read-manga/under_grand_hotel_kiss_kill/

http://www.mangago.zone/read-manga/aiso_tsukashi/
http://www.mangago.zone/read-manga/endless_world/
http://www.mangago.zone/read-manga/j_no_subete/