The Suicide Shop (2012) on Netflix

Plot summary

The shop sits in a gloomy French city where the wish to die is common. It sells customers whatever they need to end their own life, in whatever manner they choose, and the Tuvache family has kept it running for years. Mishima Tuvache and his wife Lucrèce work the counter with their two apathetic children, Vincent and Marilyn. Lucrèce then gives birth to a third child, Alan, who smiles from his first days and finds happiness in everything he sees. His cheerful nature does not suit the family trade, and the customers who come in for the shop's goods take notice of the boy.