This scene is being reworked in the next update to be more forgiving.
But for now, to avoid the bad end you need either of the below:
- Shini love 0: total corruption 16+
- Shini love 1: total corruption 10+
- Shini love 2: total corruption 0 AND pick 'Please stop.'
- Shini love 3+
You can increase Shinigami's love throughout the game with different choices.