From the comments i thought the ghost met her when she was like 5, but she was 16 and confessed to him when 19. I mean yeah its weird though he tried to cut it off at one point too. More than anything i feel really bad for the new guy. Sure i want the ghost to have a body but stealing the body of such a sweetheart feels so wrong
If the theory is true then it would be beyond fucked up. Equivalent to someone blindfolding u before having sex and inviting a random in on the fun. It would totally break any trust and relationship these two have. And most of all, it would mean the ml doesnt truly like the mc if hes okay with his twin chiming in on the fun