Please help me find this BL!

Hello everyone! So I was wondering if anyone can help me find this one BL that I lost. I found this one while scrolling on IG and I accidentally refreshed my page lol. Here’s the description of how I last remembered the Yaoi is:

-Mc Is a blond man

-he was about to confess to this girl (black hair) and the girl says “sorry, I’m into girls”.

– out of panic, he said “I have a boyfriend too!”

– girls holds his hand in glee and was cheering on him. She asked him for a double date since she admitted that she just got a girlfriend.

-because of this, MC rushed to his friend and kneeled infront of him asking to be his boyfriend for one day and after that he can do whatever he pleases

-FL is intrigued. His hair is black

The last thing I remember from the title is “Double Date” but when I search it nothing pops up. It’s a collaboration work to another author (I think monbyung? Monbyul??) pleasepleaseplease help me!