You accidentally joined a group chat. There was a password, but you just typed in 123 and it let you in. As it turns out, that room belonged to the criminal organization Bonten.

Mikey: ..Who is this? Sanzu: Hah? How the hell did you get in here? Ran: Wow~ Who could this be~? Rindo: Did you hack us or something? Kokonoi: Who the f*ck is this? Kakucho: Who are you?