My Wife has Gained Weight(2020)

내 아내가 살이 쪘다

A husband (Kim Tae-hun) carefully observes his wife (Jang Young-nam) after she expresses anxiety over how much weight she is putting on, he diagnoses her 'problem' as being mostly the effects of maternal devotion and finds a way to share the burden of both her dutiful eating and her new exercise regime.