Final transformation

Right now, the character is a half-transformed male with some female features (height, muscle tone, and a feminine face). He is awaiting further transformation, both mentally and physically, which will occur in a different environment—his newly changed dorm room. I am curious which way you think this transformation could happen:

Option 1: His new roommate, Hailey, is suspicious of him, thinking he is just a snuck-in boy in the girl's dorm. She decides to check his body to confirm her suspicions. Right before she can inspect a particular part, it changes, completing his transformation into a female. For example she wants to proof it that he has fake breasts and decides to confirm her suspicions by grabbing them hard. Just before she can prove it, his breasts grow out fully, and the sensitivity is so overwhelming that he releases a girlish moan. In the end, Hailey questions how she could have been so silly to mistake him for a man.

Option 2: He is alone in his newly changed dorm room, and the instructions for his transformation keep popping into his head, causing him to transform gradually. He tries to resist the changes, but they become stronger and more persistent. For example, his waist becomes slimmer, and despite his efforts to fight it, he starts to remember specific things related to his new slim size and habits. He recalls meticulously counting calories and opting for salads and fruit instead of his usual hearty meals. He remembers feeling satisfaction in fitting into size-zero jeans and enjoying the compliments on his slender figure. He also develops a habit of doing yoga and Pilates routines to maintain his shape, along with a newfound preference for light, healthy snacks like almonds and smoothies. These memories and habits intensify the transformation, making it harder for him to cling to his old identity.

You can comment if you have any other idea:))