Flan's butt is the main attraction to this image.

She should get the naughty face tag just for that

Now that's a room, ripe with the stench of bitches.
I like Flan's expression and the look she's giving here. Almost like she sending the viewer a message.

"When you get tired of listening to my sister, reminding you how much better she is than you, why don't you come down to my room and I'll show you how much better I am, than my sister. ❤"

user_509926 said:

Now that's a room, ripe with the stench of bitches.
I like Flan's expression and the look she's giving here. Almost like she sending the viewer a message.

So is Sakuya, although in her case the message is, "Don't you worry about a thing, I'll handle this one here." :)