"Heart strings" refers to the strong emotions or feelings that someone experiences, often related to love, compassion, or deep sentimentality. It describes the sensation of having one's emotions deeply touched or stirred. Full definition
Here are some amazing photos and videos that will tug at heart strings and remind us all why we need to rally around these amazing animals. (treehugger.com)
Man, if I'm being honest today is a tug - at - the - heart strings kinda day. (bylaurenm.com)