Yebibi having memory loss and getting possessed by the Qingming sword is the perfect set-up for a reverse rape doujin.
Imagine it. Your kind bubbly senior. She dresses a little... lightly but she's still a good person. She comes to check on you after some intense training. You're too tired to move. She presses her forehead against yours to make sure you don't have a fever. She's so close you can smell her lemongrass perfume mixing with her sweat. She gives you a reassuring smile.
<You're gonna be okay junior :)
You close your eyes and can feel the pain washing away from her gentle touch. Until...
>*rrrrrrip*
She tears your pants into shreds.
>Senior Yebibi, w-what are you doing
Her hair has turned white and she's got the kind of seductive expression you'd never expect from your innocent senior. She firmly grips your staff and gives you the nine heavenly cloud consuming dragon splitting one-handed dual cultivation techniques one after the other.
<*chu chu smooooooch GLUG GLUG GLUG GOK GOK GOK GOK*
<*Sprrt sprrt sprrrrrrrrrrrrrrt*
And you keep cumming but she just won't stop
>AIIIIIIEEEEEEEE SENIOR YAMERO! HANASE!
You make the deadly mistake of trying to grab her head, and Qbibi catches both of your hands.
>Hmph. Raising your hands against a nascent soul that has reached the immortal realm... how foolish. YOU ARE COURTING DEATH!!
And she finishes you off with the no grip moon splitting soul sucking rush.
<*rerorerorerorero slrp slrrp slrrrrrrrrrrrrrrrrrrp mmmMMM POP*
>Guh... uuuuuuh...
All of this oral sex took a long time to describe, but actually happened in an instant. Qbibi politely pulls a cover over your drained body and then presses her head against yours just like before. She gargles for a little... then swallows and burps in your face. She switches back. You look like a corpse.
Yebibi snaps back in shock
<Huh? Junior?! You're heating up! (and why is there hair on my mouth?). Oh geez you have a fever after all, I'll go ask Shellboo for some herbs!
Owari da. Deprived of your yang energy, you move on to the next plane.