"Hey, Len", Rin distracted her brother from his videogame. "Let's die tonight".
"Why?" he asked in confusion.
"Why not?" Rin answered.
"Fair enough", Len laughed. "How should we die then?"
"I'll just stop my heart", Rin said. "Here it goes, will be dead in a sec…"
Len was about to say that one can't simply will their heart to stop, but his sister has already dropped dead. He couldn't even tell if she meant to abbreviate "second" or just died mid word.
"Then I will die in my sleep", Len decided and went to bed to never wake up again.