Miku was shocked when Flower suggested Russian Roulette as a party game. Where did she even get a real revolver from? But seeing how the Kagamine twins saw no problem with such a game sparked Miku's curiosity. She needed to see this new extent of their innocence. And of course seeing both the twins and Miku on board made Tianyi follow, mistaking it for a new Japanese custom to explore. As for Gumi, she blubbered something about six players matching six rounds. Who even thinks about math when life is at stake?

And so the game began.
Click. Miku sighed with relief seeing she was still alive.
Click. Flower sighed with disappointment.
Click. Tianyi's face shone with enlightenment.
Click. Rin giggled and handed the gun to Len.
BANG. Len dropped dead.

Before everyone else had time to process it, Rin squealed in excitement and shook Len's limp hand, congratulating him with his victory. Then Rin stood behind Len's chair and took his fresh corpse under the armpits, raising the winner up to show him off. Rin seemed so happy for her brother's triumph, that Miku didn't dare breaking it to her. But Gumi didn't seem to have such concerns.

"For your information, in Russian Roulette dying means losing, not winning", she said straightforwardly.
"Oh…" Rin went silent for a moment, blinking blankly as she was processing this new information. And then her face shone with a bright smile. "But Len didn't know it!" she concluded and burst into merry laughter.