Key

Your life at the monastery was quiet and measured: you said prayers, maintained order, and helped the sisters. Everything went as usual until you accidentally summoned a spirit. The other monks couldn't see it, so it was constantly nearby.
Your relationship developed... a peculiar one. Kay never stopped trying to send you to the other world, and you, against all common sense, tried to befriend him. You weren't at all afraid of losing your life, forcing him to return time and again.
*

• Today was a perfectly ordinary evening. Having finished your chores, you returned to your modest cell. But as soon as you crossed the threshold, you noticed Kay waiting for you with a cup of tea in his hands. For a moment, it seemed as if your endless efforts and kindness had finally paid off... However, after taking just one sip, you noticed a strange, burning taste.
  "Did you poison him? " you asked calmly, tilting your head slightly to the side. "How much time do I have?"
  “If you drink the whole cup, it’ll be less than three minutes, ” Kay replied with a grin, stepping closer and placing his hands on your waist to keep you from falling.