![](/images/home/manga-img-anonymous-30.png)
Hands don't work like that, lol. The position is known as "kabe-don". "Kabe" means wall and "don" is the sound of someone hitting a hard object such as a wall. It supposedly shows your dominance in an intimate way.
![](/images/home/manga-img-anonymous-30.png)
Oh, I didn't even notice that it could be a separate panel. You're right, it's most likely Sui pushing the older brother. I apologize for being an idiot.
![](/images/home/manga-img-anonymous-30.png)
No that's fine I also thought it was the old bro's hand. Now all I can think is: "Don't push him away Sui!!" >.<
http://www.mangago.me/read-manga/ani_to_wa_koinaka_nandesu_ga/mf/c001/21/
Where did that wall come from?