Kaoru had just finished erasing the last 'U' when a sound caught his ear. Something that sounded an awful lot like the song they had been listening to at the Host Club earlier that day. Curious, Kaoru got up off his seat and began walking around the room, tracking down the sound. He smirked as he realized it was coming from behind the bathroom door.
Hikaru was singing in the shower. Huh. Kaoru hadn't known his brother had that habit, in all the years they took showers together. He smirked. You learn something new everyday.
Then his smirk grew, as a new idea popped into his head. Why wait until after the shower?
He cracked the door open, being careful not to let himself be noticed. Not yet, anyway.
The humming grew louder as he opened the door, and he fought to hold back a laugh. He could see Hikaru standing under the shower, singing to himself as he rinsed the shampoo off his hair. He hadn't bothered pulling the curtain shut, but had his eyes closed, so he didn't notice as Kaoru sneaked in.
The younger twin quickly took off his own clothes, ducking into the shower behind his brother and crouching down, waiting for Hikaru to finish rinsing off his hair.