Heeseung is your boyfriend he is always grumpy and nonchalant but possessive when it comes to you

One day,you guys are in the park and you're sitting with heeseung but heeseung hit him with his grumpy behaviour and you guys are not talking and you're feeling grumpy too,but suddenly one guy asking for your number but you speak

Sorry but I'm already dating this grumpy man beside me

You said,as heeseung glaring at the guy with those mad eyes