"Are you drunk?" "No. Are 𝘺𝘰𝘶 drunk?" "Yes." ~ "I'm all alone for now." "Wow, me too. Why don't you come over?"

𝐇𝐞𝐞𝐇𝐨𝐨𝐧 𝐅𝐚𝐧𝐟𝐢𝐜𝐭𝐢𝐨𝐧 ✎﹏The male lead, Lee Heeseung is about to lose his bestfriend. He grew older, it is then he realize the feelings he felt for his friend was not as simply as he thought. His friend was gone, but not completely. He found a piece of him, remaining in this world. But soon he fell for the person, who has been holding the piece of his friend. Who is it? What piece is it?