In the hospital emergency room scene, a spiky-haired actor in a white lab coat is seen sitting at a desk. This is a reference to Dr Pornthip Rojanasunand, Thailand's best-known forensic pathologist - who's not only a celebrity for her wild hairstyle, but also for her skill and integrity.
The Thai title means, literally, "Love Story, a Little, a Lot" with a play of words on "Noi" and "Nid" which means "few" and "small" respectively. The two words are also the names of the sisters in the movie so the title can also means "Love Story of Noi and Nid, a Lot" (mahasan = infinitely a lot, a great amount). Another interpretation can be "A small/little Love Story that is a lot".
The original script was written by the director before he made "Monrak Transistor". However, he decided to shelve it for a while. When he decided to make another film, he gave this script to Prabda Yoon and Prabda rewrote it.
Yukio Mishima, the author of "The Last Lizard", the book featured in the film, committed Harakiri (suicide by stabbing yourself in the stomach with a short knife). This is perhaps one of the reasons why Kenji likes the author.