She will cry blood tears and the entire screen will go dark red and play the distorted version of ‘Okay Everyone!’. This is when Natsuki will mention that the players have been spending way too much time with Yuri and her face will begin to glitch in black-colored pixels.
On day 3 of Act 2 when the players are done writing 2 poems with her, it will be time to share the third poem. When the players are in Act 2 of Doki Doki Literature Club Plus, they will witness Natsuki’s end where her neck will snap.