Yes they do.

"Hm," Midoriya said in confusion as he looked over at the source of the noise, seeing Jiro and the rest of his female classmates, blushing a bit at the sight of their swimsuits (especially Uraraka's).

He quickly pushed these thoughts out of his mind, as he turned toward their direction to go say hello (thankfully heading more into above waist water, Jiros laughter ironically saving him from obliviously exposing himself to the entire beach...for the moment).

The green haired boy walked toward them, eventually swimming as the water got deeper, a few bits of seaweed brushing his bare leg, this almost clued him into his state of undress but not quite as he thought it was probably just getting up his shorts.

"Hey guys," Midoriya shouted to the girls as he swam closer, all of them turning to look over at him, all of them blushing, whilst Jiro, Mina, and Hagakure giggled amongst themselves, Momo kept her hand to her mouth to keep her laughter at bay as she made and distributed swimming goggles to everyone.

This confused Deku but he paid it no mind, as he got closer everyone save Tsu and Uraraka put on the eyewear, and were getting ready to dive under; Tsu having already seen his baby dick for herself and Ochaco living in pure denial that her crush couldnt eventually satisfy her.

"Whats up," Midoriya greeted as he finally made his way over, as the rest of the girls, grinned at him as they dove under. Uraraka and Tsu refused eye contact, merely looking away at other parts of the beach.

"H-Hey D-D-Dic-I mean Deku," Uraraka greeted.

"T-Tiny, Ribbit," Tsu said, quickly covering her mouth.

"Tiny," Midoriya questioned.

"T-Tiny World isnt it," Uraraka came in with the save, "R-Running into you here."

"Yeah I know right, I didnt know you guys were coming," Midoriya replied, failing to notice the camera flashes underwater, the girls wanting proof of his "manhood" Momo having made water proof cameras on the fly.

"S-Sorry we didnt say, it was a kind of the spur of the moment thing," Uraraka said as her eyes drifted over to him, but quickly her eyes darted as her blush intensified.

"Oh same with me, I decided i wanted to just relax today, my arms have been sore from training. Its been fun, although a bit tough since im pretty insecure about my body admittedly."

You dont say," Tsu said aloud, Uraraka biting her tongue to stop her from laughing.

"Sadly yeah, plus i almost drowned earlier because of wave but thankfully i got to the surface before anything horrible could happen."

"Oh I bet," Uraraka squeaked.

"So what are the others doing, I saw them dive under but they havent come back up for a bit."

"Oh, theyre just taking in some underwater sights ribbit."

"That sounds cool, theres probably some amazing species of fish and really beautiful corral down there."

"Not only that but some world record breaking discoveries," Tsu giggled.

"Like what," Deku asked.

"Worlds smallest peni-I uh mean fish," Tsu lied.

"Worlds snallest fish?"

"Mhm ribbit, we found some uh microscopic fish."

"How small?'

"Larve sized," Tsu replied, as the other girls shot up from the water, taking off their goggles as they laughed.

"HAHAHAHAHAHHAHHAHHH OHHHHG MAN," Mina shouted as held her belly.

"Daaaaaaaaaamn that shits pathetic," Jiro wiped a tear from her eye.

"Im gonna tell everyone," Hagakure laughed.

"My my this was quite the discovery," Momo blushed but kept civil as her laughter was mostly internal.

"Find anything good," Midoriya asked while his confusion intensified.

Momo quickly collecting everyones goggles, and putting them in a decently large bag, and then shoving it in Midoriyas hand.

"Yep, historical find you might say," Momo giggled as the other girls quickly ran to shore, "Hey Midoriya, do us a favor and carry this bag to shore for us, the contents are pretty fragile so be sure to not drop them okay? Okay! Also hold them over your head," Momo quickly swam away and ran toward the shore, having one arm over her large chest to keep them from bouncing too much.

Deku (although weirded out) did what was asked of him, slowly making his way toward the shore, the girls all waiting for him to reach it, Jiro gripped Urarakas arms to keep her from moving so she could see what they all did.

"I wonder what got them in a rush all of a sudden," he wondered as he got closer and closer to shore, the anticipation growing as his feet touched the sand underneath the water, the girls excitement could barely be contained, each step revealing more and more skin.

*step*

His belly button visible.

*step*

His waist then visible

*step*

...

*step*

...

*step*

...

Urarakas mind lurged, but she couldn't hold it in.

"HAHAHAHAHAHAHAHAHAHAHAHAHAHAHHAHAHAHAHHAHAHAHAHAHAH!"

The girls laughter causing our foolish green haired victim to stop walking, both confused and concerned.

Unfortunately for him the other girls joined in on the laughter, catching the attention of the entire beach.

Midoriyas eyes drifted from the girls to several points of the area he saw:

Other girls laughing.

Guys biting their knuckles and laughing.

Parents covering their childrens eyes.

And the rest making gestures with their pinky fingers.

...

Deku's blood ran cold, the last one could only mean 1 thing, and the breeze that just blowed by certainly didnt help his mind (or his size). Slowly his eyes trailed down, praying he didnt see...

...

...

...

His eyes were soon met, with his shriveled, hairless, shrunken, microscopic penis.

His horrifying secret now known to the entire beach, and worst of all his crush.

"AAHHHHHHHHHHHHHHHHHHHHH," he shouted as he quickly dropped the bag and ran away, the intense humiliation making him forget his bag as he clapped both hands over his shame.

The beachgoers getting a good view of his bubble butt, as he began his streak home.