"Want to try something new?" asks your Kanna-girlfriend.
"I'm not going to say no to you," is your response.
"My turn to change you." She can change other people? That's definitely new.
She grins and pounces, bringing you back down on the bed with her. Her lips meet yours and your lust quickly flares again as you start making out.
She kisses down your neck and you gasp when her mouth finds your nipple. Your flat chest seems softer and your breasts begin to bud into small handfuls. You realize what she has planned as she kisses and fondles your new little titties. The changes don't stop there, and you shiver as your waist draws in and your hips push out. You can't see yourself very clearly but you can feel a brief tingling sensation as your facial features shift to become entirely girlish and feminine.
"I'm going to show you how to really please a woman," she coos.
You sure don't want to stop her. Your body continues to change and your lithe asian girlfriend sucks your tits as they swell to well-rounded D cups. Your new body seems almost too sensitive and you don't even notice as what little remains of your manhood shrinks away.
Then your girlfriend is between your legs and sliding her tongue along the wet lips of your newly formed pussy. Her licking is warm and insistent, and completely expert. It's only moments until she has you mewling and moaning with ecstasy. It becomes too much for you and you have to tell her to stop as your legs shake.