とろける
とろける · torokeru · JLPT N1 · noun
thaw
🍦 とろ (gooey, soft) + ける (verb ending for becoming) = to turn gooey and melt
とろ names a soft, gooey state, as in fatty toro tuna, and ける turns it into a verb meaning to become. Being enchanted is like your heart going soft and melty.