adverb, adverb taking the 'to' particle
with a squeeze in one's chest; heart-throbbing; choked up
Describes a sudden, tight feeling in the chest caused by strong emotion, such as love, sadness, or nostalgia. Often used in the phrase 胸がきゅんとなる.
My heart squeezed when I saw his smile.
His kind words made my heart squeeze with emotion.
I got choked up at the parting scene and tears came out.
Seeing that photo gave me a little heart-tug.