Why did he have to lie to her?

Flashback

"Pai-san, can you swim?" Retasu asked.

"Of course." Pai said.

"Can you give me lessons?" she had asked.

"Yes. Meet me at the beach." Pai said. He walked away.

End flashback.

The truth is, he couldn't swim. He could fly or teleport, but he couldn't swim. "Retasu, observe." Pai said. Retasu watched as he jumped in. He never resurfaced.

"Pai? Are you okay?" Retasu called. Bubbles floated to the surface. "PAI!" She jumped in. He was floating in the water. The last thing he saw before passing out was green… Retasu got to him. Surprisingly, she could breathe. She swam down and grabbed him. Retasu took Pai to the surface.

"What happened?" Pai asked when he woke up hours later.

"You can't swim, can you?" Retasu asked.

"No…" Pai sighed. He blushed.

"Would you be surprised if I told you I could breathe underwater?"

"Yes!"

"Looks like I'm not the one who needs lessons!"