How would it feel to be unable to experience any grief after demolishing one’s own major source of existence?

Venus in the Fog

Cansu and Oguz, a couple in their mid-twenties, deeply love each other for many years. Oguz is a strong person who always supports and motivates his partner whereas Cansu’s love is inspiring for everyone around but she is always afraid about becoming distanced from Oguz. However, this fear unexpectedly turns into different feelings when her concerns become real in the most extreme way.