"We can't be friends anymore..."

When Nozomi woke up, she was naked and in a stranger's bed. All she could remember is that her boyfriend had cheated on her and that she had drank to her heart's content at a karaoke, but nothing after that. As she tries to piece together the events of the previous night, she comes to an earth-shattering revelation about the relationship she currently has with the person she calls "best friend".

(Source: Sony, translated)