Inseki Kazoku (2020)

Housewife Kadokura Kumiko lives in a residential neighbourhood in Setagaya with her husband Kazuhiko, their two daughters Misaki and Yuzuki, and her mother-in-law Masako. They seem to be an ordinary, happy family. But when the sudden news breaks that all life on earth will be wiped out by an approaching meteorite in six months time, Kumiko decides that she cannot confidently say she will be happy together with her family in her last moments. Because there is a man that she likes and she wants to be with him. The family is shocked. But she shakes them off and rushes out of the house when they try to hold her back. But it does not end there. Kumiko’s actions trigger a storm, unleashing the secret desires that her two daughters, husband and also mother-in-law had never even confided to the family all this while.
(Source: Jdrama Weblog)