I highly believe Uke was drunk and he saw a duplicate of the Seme but in reality only the Seme is fucking the Uke. He woke up and found the past version of the Seme gone cause he was never there, then the Uke shrugged it off and cuddled with the present Seme.
MC was drunk, he hallucinated all that and seme in reality was probably confused. There is only one in reality that is fucking MC, it’s his boyfriend-the seme.
The hallucination of the other was a past version of seme. In reality, it was only one fucking him- the present day version of seme.
I highly believe Uke was drunk and he saw a duplicate of the Seme but in reality only the Seme is fucking the Uke. He woke up and found the past version of the Seme gone cause he was never there, then the Uke shrugged it off and cuddled with the present Seme.