Fast route
Do this in order
- Step 1
Unlock Death through story progression and speak to them whenever a new personal quest marker appears.
- Step 2
Complete Death’s help requests and use regular gifts or conversations between quests.
- Step 3
Finish the friendship-confirming scene; if the achievement lags, speak once more on the next night.
Prepare before you start
Do not begin until the related system or story area is unlocked. Keep the achievement condition visible while you play, and save before seasonal or one-night attempts.