How Can I Prove to the Host That I Am Not a Hallucination?

"I'm not a hallucination! If you don't believe me, just touch it and see!" "Where to touch?" Calm and self-possessed young doctor Ellen Wilkes encounters the biggest challenge of her career—— Suddenly there was a noisy girl in his consciousness who called herself "Si Jia". Not only did she insist that she was from another world, she was also curious about his male body. "Take one pill at a time, three times a day, to cure hallucinations... Hey, what are you doing!" "Take medicine to get rid of the evil lady who is possessing me in my mind." "Wait a minute, if I can do something you can't do, that proves that I'm real, right?" Ellen: "Theory holds true." "Okay! Now unbutton your shirt and trousers—" "Dismissed." Prisoners of dual paths, eight paths to attain godhood, two souls trapped in one body, public enemies in the city: the cold-faced doctor who was framed as a blood witch × the time-traveler girl who was forced to become an accomplice "Who are you anyway?" "You... The destined beautiful girl cheat?" (The heroine of the time traveler, dual pathways, living together inside the skull.)