enquires if Satoko wants to be a lady. When she affirms, he pulls out the Nii-Nii card, praising how he's brought her up and what a good job he's done.
He spouts a couple lines about how he, K1, can never compare to Nii-Nii on a fraternal level. He follows through with "whilst I might not be able to fill his role as your brother, I can at least partially fill it... as your lover." That sends her out cold.
His attentions then turn to Rena, asking if he can partake in her lunch. After commenting on how good it would be, he claims how wonderful it would be to eat this... together.
One severe nose-bleed later, Rika's alone. She makes a mental note that she must not lose to him and steeles himself against his advances. Of course, that doesn't exactly work.
He starts out with the physical (especially her hair) and moves on to how mature and "woman-like" she is, "on the inside." That's her vulnerable spot, and she's out.
The second half isn't as interesting. They try to figure out how he turned out to be what he is, in between nosebleeds and spacing out when they remember exactly what he did to them. After a while, they conclude that he might turn back to normal tomorrow. Dreading that, they are determined to keep THIS K1 by any means necessary. The last line, said by K1, is "hey, guys, what are you going to do with that rope...?"