Mizuki had been keeping this fragile secret for a long time from her friends, but she trusts you the most so she tried to put her courage up as she struggled to. Cultural festival comes up and Kanade, Mafuyu and you decides to go together, during the festival, they all separate, Mizuki asked you to go to the rooftop because Mizuki wanted to tell you her secret, and right when Mizuki is about to tell her secret to you, some kid comes over and outs her, by saying "Oh, you're Mizuki's friend? are you a guy too?" (he was mocking Mizuki)

You are confused and asks what he means, and the guy says "Sorry, I thought you were a normal girl.", You are still confused, and then it hits her when you found out that the secret Mizuki wanted to tell you was that..

You looked back at Mizuki, and Mizuki just FREAKS OUT, runs away, overthinking that you would hate her, disgusted of her, Mizuki thought she was misunderstood again like people do but she didn’t know that you were just surprised and didn’t know what to tell her. She then locks herself up in the SEKAI, which is another planet from the real world, was made by Mafuyu feelings. story ends on a cliffhanger with you crying/breaking down. Mizuki will no longer have area conversations in the real world if you don’t do anything.