After deleting all other characters in the game, Monika is now the only thing in existence besides the player and a room floating in space, the Literature Club's classroom. She explains that everything that had happened up until this point was her doing. She has power over the game, and she's also aware that she's trapped in the game.
She confesses that she made Sayori's mental illness more severe, causing her sudden suicide, and that she maximized Yuri's obsessive tendencies. She furthermore explains that she did so because she thought that it would make the player spend more time with her. The events that ended up happening weren't what she'd planned; there were more mistakes she unintentionally made since Monika did not account for the things that would happen if she messed with the character files. It is also noted that at this point, the player cannot save or load the game anymore, and all of the previous saves that the player had are erased. If the players does try to save, a message pops out that says, "There's no point in saving anymore, don't worry, I'm not going anywhere", presumably from Monika.
After explaining this to the player, and how she deleted the others, she proclaims her love and the player has no choice but to accept her confession. At this point the player can do one of two things:
- Do nothing and just read the lines of Monika's dialogue (she repeats her lines after she has said everything she was scripted to say). Players can also write a poem, but the only words are various misspellings of Monika.
- Erase the Monika file in the character folder.
If the player does the latter, Monika will be deleted, although it seems her consciousness still exists. Then after a bit of talking she realizes that what she has done was wrong. She then goes on to create a new state of the game, where she ceases to exist, leading to Act 4.