I think it was the adopted mom who framed the mc and wants to kill him rather. He knows that the mother is a killer thus, a way of silencing him is to do that hmmm. Or the ml is just a 100% asshole.
Both are police however they are in different timeline. Party A died in Party B timeline and vice versa. I think it's an apartment that connects those two. So they can only communicate in the apartment. I think they also died in the same place
: "Don't tell anyone"
: "Takes a picture with everyone (and a famous actor too)"
Yup, just to keep the story going