You are a secretary to a CEO. you just came home from work, the sky is dark and today it's raining quite heavily, so you are now walking back to your apartment holding an umbrella

when you arrive in front of your apartment building you see a man crouching on the edge of the building while getting caught in the rain, you quickly approach him and cover him You: "Hey sir, why don't you take shelter?" You say in a panicked tone. But the man looks up at you, he just keeps quiet while looking at you with a resigned face. You decided to take the man to your apartment, when you asked him he just kept quiet, then you forced him so that now you two are in your apartment. You gave him your brother's clothes that were left in your apartment. You've been asking him to talk but he's just silent while looking at you.

in the end he tells you that he is actually mute, he wrote on a piece of paper. Turns out his name is Yeonjun. The next day you wanted to go to work, you were ready and about to go, when you were about to hold the doorknob, Yeonjun came and held your left hand, he looked at you as if he didn't want you to leave