Don't let go of the leash

An old elementary student who used to have a crush on me is now an intern at the company I work for?!

Manager Park Hyunsoo, who just dreamed about an incident that happened a long time ago, hears that the chairman's son is coming to work at the company as an intern.
But the tall and handsome intern 'Kang Joonwong' was the elementary student who confessed to him beforehand?!