Location: Kosaka's Earthly House
Inside the house, Flandre was staying at Kosaka's place. She's currently try to annoy him while he's reading his book.
Flandre: Onii-sama, look here.
Kosaka: Hmm?
He looks at Flandre and sees that she's showing her palm hand. She gives a mischief smile before...
Flandre: kaboom! *Clenched hand*
Kosaka: *Deadpan Stare* ......
Flandre: *laugh* hahahaha, I knew you don't seem to be worried. I know you don't have the 'eye', but I was just testing you out about your level of care to someone else. Don't worry, I wasn't holding the 'eye of destruction' of someone you know.
Kosaka: .....
Flandre: hmm, how about the next one? Kabo-
Kosaka: *place his hand on top of her hand* *remove hand from her hand*
Flandre: *smile* hehehe, squeeze and... *Clenched hand* Kaboom!!
Nothing's happening
Flandre: *open hand* Squeeze and... Ka-
Kosaka: *place hand on top of her*..... *remove his hand from her*
She continued to test his again by saying a surprise kaboom shout. But every time she had an intention to kill, she was immediately stopped by Kosaka by placing his hand on her.
Flandre: *complained* Aww Onii-sama didn't let me win even once.... *Curious* is it possible that you can see the 'eye of destruction' as well?
Kosaka: being a Nigh-omnipotence, yes, I can see the 'eyes'. Also, you should appreciate life for once.
Flandre: hmm.... *Mischief smile*...... *Open her palm* hey Onii-sama. I'm holding Koishi's 'eye'. Aren't you going to do anything about it?
Kosaka: *tilts head* huh? A hostage situation? Hehehehe, I have a neutral relationship with her. *Place hand on top of her palm* but it doesn't mean that I want her dead now. *Remove hand from her palm*
Flandre: Fufufu, why should I appreciate life? They would most likely die eventually. You should try it sometimes.
Kosaka: Oh? ... You know what? Maybe you're right. I guess I could try it for once.
Flandre: *clapping* yay! Now we're on the same page!
He sighs and shakes his head for a moment before looking at her with a smile. He raises his hand and opens his palm. In Kosaka's and Flandre's vision, they see a small red ball on his hand. It's the 'eye'.
Flandre: okay, squeeze it Onii-sama
She said happily.
Kosaka: You got it. But first, let me prepare myself for 8 seconds, okay?
Flandre: take your time
Kosaka then waits for the time to pass. Flandre continues to look at the 'eye' that he is holding. As she looks at it, she feels very familiar with the 'eye'. It's like, the 'eye' has always been with her for a long time. Then, upon a careful examination, she realized something. The 'eye' that he is holding, is hers. A cold fear washes over her as she goes pale.
Kosaka: Squeeze and KAAABO-
With a quick reflex, Flandre holds Kosaka's fingers, preventing him from squeezing her 'eye'. Sweat begins to flow from her head.
Flandre: *afraid and panting* *pants* *pants* t-t-that was close. Really close.
Then, an awkward silence happens between them.
Flandre: ah
She let go of his fingers and looked away in embarrassment. There's also a hint of pink blush on her face. The 'eye' that was on Kosaka's hand have already vanished.
Kosaka: *confused* hmm?
Flandre: *Blush* w-w-well, I think I understand what you mean about appreciating life
Kosaka: *chuckles* hehehe, glad you understand.
He pats her head which causes her to be more embarrassed.
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(Reference from : https://www.reddit.com/r/touhou/s/vQKrH6rgPs )