Hello, Seven

Rein finds herself in a weird situation. Yesterday, she remembers herself hungover from her friend's party. Now, she wakes up to be in an alternate dimension. "Am I still Rein?" She wonders as she look her own reflecfion in front of a vanity mirror. Yes, it's her but everything seems different. She got fatter and older looking than yesterday. Not to mention, everyone she knew got weirder and weirder. What in the world is happening?