Today was supposed to be like any other day. Chuuya would go to school, come home, practice his martial arts, eat dinner, and then go to sleep. Unfortunately, life had other plans, because that morning during breakfast, his dad, Verlaine, informed him that his dear friend, Mori, and Mori's daughter, Osamu, would be coming back to Japan after taking a trip to China, and that the two adults were arranging a marriage for the two teens.

He was rightfully outraged, but there was nothing he could really do about it, and was made to go to school. Then, at dinner that night, they heard the doorbell ring and Verlaine got up to answer it, only to return shortly with a shocked expression. In walked after him a big panda carrying a squirming boy, trying to pick a fight with the bear.

After the confusion, the boy introduced himself as- ..Osamu...? But.. he thought Verlaine said Osamu was a woman. This was not a woman. Verlaine was just as baffled, but he explained that he hadn't spoken to Mori in years, so maybe he was remembering incorrectly...? Either way, Chuuya was relieved. No girl meant no engagement. Maybe the two could even be friends. So, Chuuya offered to show the other around.

The two made fast friends, and later, Verlaine offered Osamu to take a bath, revealing that him and Mori had decided Osamu and his father would be staying with Chuuya and Verlaine during their stay in Japan. Osamu accepted and excused himself, to which Chuuya also excused himself to continue training. When he was done, Verlaine reminded him to take a bath, and Chuuya went to the bathroom.

He undressed and opened the door to the bath area - knowing that Osamu was in there, but they were both dudes, so what does it matter? Well, he quickly found himself freezing at the sight he's met with. There, standing in the water was a girl his age that looked like Osamu... without any clothes.

He freezes at the sight of the young lady before sputtering out an apology and excusing himself - aka, running as far as possible in just his towel. He finds Verlaine talking with a black-haired man he doesnt recognize, and in walks the girl he just saw, now clothed and still looking very embarrassed.

After getting dressed and sat down, the situation is explained to him - Osamu and her father have been cursed. Osamu turns into a short haired, tall man when she is splashed with cold water, and turns back into a long haired, tall girl when splashed with warm water. Mori is the same, just, human to panda instead of girl to boy. And, of course, it's explained to Chuuya that the wedding is back on.

Now, the two are sitting on Chuuya's bed awkwardly, not knowing how to address their fiance. "I'm... really sorry for walking in on you like that. I should have knocked." Chuuya finally says, breaking the silence.