天「同じ女なのに何なのよこの…この！別に羨ましくないけど！」
紫「そんなこと言われても困りますわー…」
天「羨ましくないけどー！あーもうなにこれやわっこい！」
紫「ちょっこらこらこら！！揉むな！」

女の子同士だからこそ成立するスキンシップです。
ゆかてんというかてんゆか‥というのもですね。

そんな胸囲の格差社会＞illust/34976933

Ten: "Even though we're both females, what is the deal with this...this! Not that I'm especially envious!"
Yukari: "It troubles me to hear that..."
Ten: "Not that I'm especially envious, but...! Aaargh, they're so damn soft!"
Yukari: "Whoa, hey-hey-hey! Don't fondle me!"

This type of physical intimacy is established for the very reason that they're both females. The reason being that it's Yuka-Ten...or perhaps Ten-Yuka.

The disparate chest measurement society>post #1383751