I'm so confused, I might have missed something. Does Rin
have a personality disorder? Like Dissociative identity disorder aka multiple personality? She seemed really upset that he thought she was in character and I couldn't tell how serious this chapter was
They built up a game where she was allowed to show several sides of herself to MC. Then he decided to be "a good boyfriend" and only really play with her "normal" personality.
She missed being able to show sides of herself to the MC other than the usual.