It was a slightly baggy button down short sleeved t shirt and a pair of oversized shorts. "Where did Saya even find this outfit?" Yuriko wondered to herself.
As she was walking out of her room, she noticed her sister standing at the foot of the stairs, with a mischievous grin. "Why are you looking at me like that?" Yuriko said. And then it dawned on her...
"Gotcha!" Saya said as she snapped her fingers. The next moment, Yuriko's body began to transform. She grew taller and her shoulders got wider. She also gained a little bit of muscle definition in her arms and legs. She sighed resignedly as the breasts that her sisters and friends were so jealous of shrank and became a pair of flat pecs...
These were men's clothes...
"Oh, come on..." Yuriko said as she unbuttoned the shirt to see a hairless man's chest underneath.
"Say cheese" Saya replied taking a photo of Yuriko and her flat chest with her phone.
Yuriko could feel her face turning red as she buttoned up her shirt again. "You know I'm not a guy right?" she said, "I'm not wearing men's underwear, so I'm still a girl down there albeit one who could pass as guy."
Saya replied tossing her a pair of men's underwear, "On the contrary Yuriko. You're going to put these on right now."
"And why would I do that?" Yuriko said.
"Because if you don't, I'll post those pictures of you and your flat chest on social media." Saya said.
"You wouldn't!" Yuriko said.
"Try me!" Saya retorted.