Build relationship with the characters. Your choices might earn you favor from one character, but disdain from another. Use items to solve problems. Confront various endings. Choose one person and face the end with them.
Guides
Love Alone Death – 100% Full Achievement Guide
Includes spoilers for the game. Ending is not directly included. How to Obtain All Achievements Happy Lilith Nice Haircut Good Lover Brother Poison Free Soup