A moment to consider Knife Boy.
No but seriously, (young) Akira, of all people, calling Sana a thirsty thot was pretty hilarious.
Also, small-brain-trying-to-big-brain-time:
Every
EGG TIMEtime this damn egg cracking sound effect is playing, I am wondering whether this is supposed to be implying that a character is
slipping traversing the planes, i.e. whether Akira somehow got transported into this weird TSS beach dimension during one of his blackouts while he was young, possibly while being groomed/molested by Sekai, hence why he is naked?
It would even kind of make sense, since "blacking out", or more accurately disassociating, is a common coping mechanism while going through a traumatic experience. He did not seem too perturbed in that scene so he might be used to experiencing those black outs and dream-like fantasies.
After all, adult Akira is also frequently blacking out when being faced with his traumatic past, i.e. Sekai, as unconventionally proven by Nodoka.
Though I'm pretty sure it's just Sel being fucky and it's a nothingburger to just confuse people.