Ranma's libido goes through the roof and he finds himself mentally changing more.

Ranma's felt himself shiver with fear as Nabiki spoke, but he also felt something else. It was like she was confirming something in him, something he'd been denying about himself. But Ranma tried to ignore those thoughts, only to feel the coin heat up between his boobs. His body didn't change anymore, but it suddenly felt like his body temperature rose as he felt his arousal surge, suddenly more horny than he'd ever been in his life. Looking down at his body, Ranma wondered why he was so scared of the coin, of the changes. His female body had always been more pleasurable, and he'd always taken a perverse please in teasing guys. Why not do more than tease, it would feel good.

Nabiki smirked as she watched Ranma's inner turmoil, than tossed him the same bunny-girl costume he'd worn the day before and told him, "Your first class is going to be here soon, you better make yourself presentable."