
He was in between reality and system so he disappeared for a moment in real world the ML tries his best to look for him and he even bought a ticket somewhere else (I guess he asked the professor) when the MC finally appeared he called the ML so they can meet (The mc was given a time limit) and when the time was about to run out around 43 seconds they finally meet by clasping each other's hands. The Mc was sent to somewhere in between reality and system sitting in a chair the system was showing him the ending like end credits or something, he have the pen again the system asking "what do you need to have a happy life" he choose the ML so he was sent back, there they hug each other and it fast forward to the entrance exam where they end up with together. Someone who will choose you over and over again is so rare and that's the kind of love they have they choose each other and will die for one another over and over again, a love that transcend any lifetime and dimensions.

Cassette tape= save their progress
save their progress= save their memories from previous games
Their memories from previous game= breaking the 4th wall, it means knowing they are a character in the game
without inserting the cassette tape= They no longer knows they are a character in a game they became a regular NPC
additional: If any of you plays video games there is a "Load game" and "New Game" option, click the load game and you will see your progress where you left it off completely intact, so the inserting the casette tape into the music player is equivalent to "load game" option.

Multiple cassettes for each player as you can see, in that one scene where they took the blue haired's cassette tape(he is unintentionally putting in the tape every prologue in car remember?) after that the blue haired does not remember anything anymore and the same goes for the character with glasses

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It's been two weeks since that incident that occured between them, MC went to school and met the guy with red hair (the one who directed the film project) then he give the pictures and usb (the ML's first acting) to our MC I thought he doesn't know that they break up but the red hair do, he tells the MC how it is obvious that they were fighting because the ML, although he keeps smiling around he's obviously not okay even though he said he was, The red hair urged the MC to make up with the ML and met with him by giving the business card of someone who wanted to scout the MC for acting, So he was convinced and went to meet with the ML but it didn't end well because he asked if its his way of breaking up with him while the ML is in fact waiting for him to apologize
MC: "그거, 헤어지잔 뜻이야?"
MC: "Is that your way of saying you want to break up?"
ML: "2주 동안 생각한 끝이 겨우 그거예요? 진짜 끝까지 실망만 심어 주네요, 당신은.
"After thinking about it for two weeks, that's all you came up with? You really only ever disappoint me, right to the end."
"다 끝난 마당에 굳이 불러냈으면 그쪽이 했어야 하는 말은 적어도 나한테 헤어지잔 의도냐는 그딴 물음이 아니라."
"In a situation where everything is already over, if you insisted on calling me out, the words you should have said were not something like, 'Was your intention to break up with me?"
"나를 속인 것에 대한 사과였어."
"It was an apology for deceiving me."
side note: Red hair said the ML also wants to make up but dohu is erm doesn't know social cues so I hope he apologizes now

This is slow burn asf shit made me giggle and kick like a teenage girl took them that long to confess and realized their feelings but it's worth reading I'm so happy to witness the ML slowly realizing how much he needs and wanted the MC and he's the who's initiating pretty much everything now (in guiding or in sëx). He's the one falling head over at the MC in this regression their relationship is nothing like before regression it's so sweet and adorable. I need moreee

MC: There was nothing good to say, so I didn't say anything because I thought there was no need to make a fuss about it.
You'll never find out the truth unless I tell you anyway
ML: Is that all you can say in this situation?
I forgot how selfish you are sorry for expecting too much. Anyway, you're more used to being alone and it's better for you. Isn't it? So don't hold on to it.
they broke up the ML also said "I don't want to be angry with you anymore yeah Dohu babe you really blew this up

also to add
spoilers:
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before the dialogue above, mc admits he did approach him to use him as inspiration and that he only had sex with him because of that and that’d he never be interested in ml if it wasn't for that, but also adds that its not true anymore and he genuinely likes him now, then they argue back and forth and end w the ml saying “i dont wanna be angry w u anymore” so mc tries to hold onto him but ml told him not to chase after him and that if he genuinely likes him like he says he does, to do what he says and leave him alone then he’ll actually believe that mc had liked him even a little bit :(

well ml was misunderstanding the whole situation and thinking that mc likes him - so think abt it like this. ml slept with him because he thought mc likes him and by sleeping w him, he thought that means he confirmed they have mutual feelings which is why ml thought they were dating while mc thought they were sex friends (cause we knew he never actually liked him but ml doesnt know that)
"Maybe this thing was a masterpiece til you tore it all up" I knew that mf is suspicious and all that crying and sht was an act
Argh I knew it but the betrayal feels real in the novel, damn the details are so disgusting I swear if I don't see the ML mopping the floor with his face