Had to fix the translation. Len dressed up as Rin so that she could get away, so her suspicion that he was a boy is the background here. His penis size doesn't enter into it.
Oh my, it's snack time...My goodness! As I thought, you're actually a little boy~♥Thank goodness, thank goodness!*flip*Crossdressing boys are so moe~~ ❤This voice is...!So~ cute!Gya!!What the hell are you doing, you hag!Eeeek!At that moment, it struck Meiko like a flash of lightning!!
Akagi reference