Ranma 1/2 features story and art by Rumiko Takahashi.

Hinako Ninomiya, Furinkan High’s newest teacher, has a special martial arts ability that drains an opponent’s energy, transforming her from her childlike stature into a tall, sultry siren. Can Ranma defeat Hinako, or will he find himself in permanent detention? And a sojourn to the remote region of Ryugenzawa reunites Akane with Shinnosuke, a mysterious boy from her childhood. But Shinnosuke doesn’t remember much of anything, and he’s dying of a deadly wound inflicted by Akane. The only thing keeping him alive is Ryugenzawa’s magical water, which is drying up. With doomed Shinnosuke on her conscience, will Akane decide to stay with him until the bitter end…?

Ranma 1/2 2-in-1 Edition 12 collects volumes 23-24 in omnibus format.