Kawaii Futago no Neru to Rune - Ch. 8

[MangaDex]

 

[elemint5]

uhh whats coming out??

 

[robertelch]

uhh whats coming out??

"It"

 

[Flame-2-Haze]

Could have worn the frilly swimsuit to hide that 'part'...

 

[Lunkli]

There are swimsuits for both men and woman that would solve both of the issues presented here. Just another instance of manga authors being too lazy to know about more than like two kinds of swimsuits, I guess.