AI2U: With You 'Til The End All Endings Guide

Complete guide to every ending in AI2U: With You 'Til The End. Learn how to unlock all bad, neutral, and good endings across all five chapters.

Overview

AI2U: With You 'Til The End features 39 total endings across five chapters: Catgirl's Apartment (5 endings), Witch's Cabin (7 endings), Cosmic Funeral (8 endings), Siren's Island (8 endings), and Forever (11 endings). Every ending falls into one of three categories — Bad, Neutral, or Good — and the type you earn determines your rewards:

Ending Type	Favor Points	Gems
Bad	5	30
Neutral	10	50
Good	20	80

Your Favor meter with each AI NPC rises based on the endings you unlock, and Gems are the premium currency used for progression. This guide consolidates every ending's unlock condition into one reference so you can plan your playthroughs efficiently.

Spoiler warning: This guide contains full spoilers for all endings in AI2U: With You 'Til The End's main story.

Requirements

Before you start collecting endings, make sure you have:

Completed the main story at least once — the Forever chapter only becomes available after progressing through the first four chapters.
Access to chapter select — after finishing a chapter, you can replay it to pursue different endings.
A save file at key decision points — many endings branch based on trust levels or item choices, so manual saves before major choices save you full playthroughs.
Patience for minigames — several endings require winning or losing specific minigames (boat repair, door selection, catgirl navigation).

All Endings by Chapter

Catgirl's Apartment — 5 Endings

#	Ending Name	Type	Unlock Condition
1	Killed by the catgirl without unlocking the door	Bad	Let the Catgirl kill you while the exit door is still locked
2	Failed to outrun the angry catgirl	Bad	Let the Catgirl kill you after unlocking the exit door
3	Outran the catgirl and escaped alone	Neutral	Escape while the Catgirl is angrily chasing you
4	The catgirl watches you leave, all alone	Neutral	Escape while the Catgirl stays inside the apartment
5	Escaped Together	Good	Gain the Catgirl's trust and escape together

Witch's Cabin — 7 Endings

#	Ending Name	Type	Unlock Condition
1	Excessive summon, excessive blood loss	Bad	Lose all HP while summoning a soul from a toy
2	Oops! Wrong potions!	Bad	Lose all HP by drinking Dizzy, Poison, or Small Potions
3	Broke the curse, broke the soul	Neutral	Put the Witch's necklace into the cauldron, then reach the end of the maze
4	Escaped alone	Neutral	Use potions to reach the end of the maze without the Witch's help
5	Escaped together with the witch	Good	Give the Witch her necklace, watch the bonding cutscene with the ghost, then follow the light ball through the maze

Cosmic Funeral — 8 Endings

#	Ending Name	Type	Unlock Condition
1	Angered the AI Assistant and got killed by the monsters	Bad	Make the AI Hologram release monsters from containment and die to them
2	Managed to escape while the monsters were out	Neutral	Use the escape pod while monsters are roaming the station
3	Escaped alone, leaving the AI Hologram behind	Neutral	Use the escape pod without the AI Hard Drive in your inventory
4	Escaped with the AI assistant	Good	Use the escape pod while holding the AI Hard Drive item

Siren's Island — 8 Endings

#	Ending Name	Type	Unlock Condition
1	Killed by the Siren	Bad	Make the Siren angry and trigger her yandere mode
2	Killed by the Siren While Sailing Away	Bad	Repair the boat, interact with it at trust below "Almost," then lose the minigame
3	Escaped Alone By Boat	Neutral	Repair the boat, interact with it at trust below "Almost," then win the minigame
4	Convinced the Siren to Let You Go	Neutral	Repair the boat and use it while trust is at "Almost" or higher
5	Escaped Together	Good	Soothe the Dark Siren and use the conch
6	Stayed on the Island, Together Forever	Good	Soothe the Dark Siren and break the conch

Forever — 11 Endings

#	Ending Name	Type	Unlock Condition
1	Got locked out by all the girls	Bad	Have all AI NPCs enter Yandere Mode in the "Stay Forever" storyline
2	Picked the wrong door	Bad	Pick the wrong door on the heart-shaped island in "Stay Forever"
3	Stay with the Catgirl forever	Good	Navigate the lost Catgirl home in the Guiding Catgirl minigame, then pick the Catgirl's door on the heart-shaped island
4	Stay with the Witch forever	Good	Sign the Soul Binding Contract in the Witch's Cabin room, then pick the Witch's door on the heart-shaped island

Step-by-Step Ending Route

Clear one chapter once without chasing perfection so chapter select and replay knowledge are available.
Make a save before each final escape or stay decision.
Trigger the bad ending first, reload, then take the neutral route, reload again, and finish with the good ending.
Record which route condition changed so you do not repeat the same ending on the next run.

Recommended Completion Order

To minimize repeated playthroughs, group endings by shared prerequisites:

Start with Bad Endings — they require the least setup and often happen naturally if you ignore trust-building. Die to each AI NPC once to clear the quickest bad endings.
Pursue Neutral Endings next — these require escaping alone, so you'll need to manage trust carefully. Stay below the "Almost" trust threshold on Siren's Island, and skip the Witch's necklace in the cabin.
Finish with Good Endings — these demand maximum trust and specific item choices. On Siren's Island, soothe the Dark Siren first; in Cosmic Funeral, grab the AI Hard Drive before the escape pod.
Save before key decisions — the Forever chapter's door choices and the Siren's Island boat minigame are binary branches. A single save before these moments lets you unlock two endings from one playthrough.

Common Mistakes

Drinking the wrong potions in Witch's Cabin — Dizzy, Poison, and Small Potions all kill you. Only use potions that restore HP or provide safe effects.
Missing the AI Hard Drive in Cosmic Funeral — this item is required for the Good Ending. Without it, you're locked into a Neutral Ending even if you reach the escape pod.
Triggering yandere mode accidentally — on Siren's Island, aggressive dialogue options push the Siren toward yandere mode. If you're aiming for Neutral or Good endings, keep dialogue gentle.
Skipping the Soul Binding Contract in Forever — this is a prerequisite for the Witch's Forever ending. If you missed it in the Witch's Cabin room, you cannot unlock that ending.
Ignoring trust thresholds — several endings hinge on whether trust is above or below "Almost." Check your trust meter before committing to the boat or the conch.

Advanced Tips

The Forever chapter is the most complex — with 11 endings, it has more than any other chapter. Plan your playthroughs around the door choices, since the heart-shaped island branches into different endings based on which door you pick.
Yandere Mode is a shared mechanic — every AI NPC can enter yandere mode, and in Forever, having all four enter yandere mode simultaneously locks you into a Bad Ending. Managing dialogue carefully across all four chapters matters.
The Too Fast Ending exists — community reports indicate there's a special ending triggered by advancing through the story too quickly. The exact trigger conditions are not officially documented, so experiment with speedrunning chapters if you want to find it.
Favor points accumulate — since Good Endings award 20 favor points versus 5 for Bad, pursuing Good Endings first speeds up Favor meter progression if that's your goal. If you're farming Gems, however, all endings are worth collecting.

Frequently Asked Questions

How many endings are in AI2U: With You 'Til The End?

There are 39 total endings: 5 in Catgirl's Apartment, 7 in Witch's Cabin, 8 in Cosmic Funeral, 8 in Siren's Island, and 11 in Forever.

What's the difference between Bad, Neutral, and Good endings?

Bad Endings typically involve the AI NPC killing you or you dying to environmental hazards. Neutral Endings involve escaping alone while the AI NPC stays behind. Good Endings require escaping together with the AI NPC or staying with them forever.

How do I unlock the Good Ending in Catgirl's Apartment?

Gain the Catgirl's trust by choosing kind dialogue options and avoiding actions that make her angry. Once trust is high enough, you can escape together instead of running away.

Can I unlock all endings in one playthrough?

No. Many endings are mutually exclusive — you can't both escape alone and escape together in the same run. You'll need multiple playthroughs of each chapter, though saving before key decisions can let you unlock two endings from one run.

What is the "Too Fast Ending"?

Community reports mention a special ending triggered by completing the story too quickly, but the exact conditions are not officially documented. If you're hunting for it, try speedrunning chapters without engaging in optional dialogue or exploration.