This movie was so touching that the whole audience was in tears.
Tips
culture
破防 comes from gaming (breaking through an enemy's armor/defense). It went mainstream around 2021 to describe having your emotional walls broken — being moved to tears, deeply hurt, or emotionally shaken by something unexpected.
usage
Can describe both positive emotions (being moved to tears by something beautiful) and negative ones (being emotionally devastated). Context determines the tone.