Siwon and Heechul were bestfriends. Heechul was like a brother to Siwon but it's like a dongsaeng kind even though he's older than him. But one day Siwon had a girlfriend and he won't spend time with Heechul like he used to. Siwon became mean to him, getting drunk at nights and even sometimes, Heechul feels like a ghost when he passes by Siwon. Heechul thinks he got all of these bad influences from his girlfriend. He started to feel lonely at times, well most of the time. After months, Siwon disappeared out of nowhere and was reported missing . . .

Was the girlfriend the suspect? Another person? Or maybe it was Heechul?