In VR hand interaction, performing consecutive actions such as rotating or inserting objects held in the hand can lead to unexpected deviations from the intended grasp positions and unintentional pop out, particularly during intricate fingertip tasks. In this study, we devised a novel approach based on the anatomical roles of individual fingers to determine the grasp direction and central point. This approach enables to maintain optimal grasp positions in response to dynamic hand pose changes during VR hand interaction.