Gonna call it now.
This is gonna end with a harem.
Rabbit girl might have misunderstood the red string, iirc shit like that if the person who has multiple red strings attached to them and only selects 1, the others would live a miserable life alone never being completely happy. The red string cannot be reattached its the reason why only 1 exist per person and the rabbit girl might have messed up big time. In the future timeline the girl MC likes probably didn't even want to marry anyone, actors always had shit like marriage and relationship shit appear in the news all the time to make them more famous, since MC was 27 at that time the actress was still in her prime time for being an actress and marrying someone limits the amount of roles she can take, since believe it or not some audience prefer the lead female actress to be single so they can self insert.
All 5 of the girls in the future more or less probably live a single life, the childhood friend who ended up being a stalker could have fixed MC's life if she just confessed and told him he was a she, but something in the family of the girl might have prevented that from happening so she ended up stalking him instead never leaving him but never approached him either because she lost her chance to be with him.
Also did the translation dgroup drop this cant seem to find any english translation after chapter 9 anywhere.