Both dramas have a topic about infidelity. Both dramas make you think about the meaning of marriage, family, and self-identity. Both dramas are the types that make you think and introspective. It's not necessarily entertaining but make you wonder. The story are realistic and can be relatable. The difference was in Dakara Koya, the female lead was cheated by her husband whereas in Anata no Koto wa Sore Hodo, the female lead is the one who was cheating.