A Simple Life with My Unobtrusive Sister Guide
A Simple Life with My Unobtrusive Sister: Relationship and Event Routes
Red and purple hearts, T-shirt and hot-day scenes, cooking promises, Philosopher's Stone heals, bathroom RNG.
Last updated: October 20, 2026
Quick Answer
Hug on wake; red hearts via chat/gifts/cooking; purple after trust; gift T-shirt + hot day home early (no Star Gate); 3× meat → Maiden's Smile; two stone heals for late nights.
Relationship content is gated, timed, and sometimes RNG. I kept three rotating saves — morning, pre‑boss, pre‑experiment — and stopped rage‑rolling without a backup.
Red and purple hearts
| Track | Raise it with |
|---|---|
| Red (trust) | Chat, gifts, playing games together, cooking, good daily choices |
| Purple (intimacy) | Unlocks after high red; nighttime teasing, chest interactions |
Variants showed up for me around 5–6 and 7 purple once red was already high. Rushing purple before trust just wasted evenings.
Opening: choose hug when she wakes you — bumps desire baseline for later routes. Respond quickly to timed prompts.
Meat Cuisine and Maiden's Smile
- After first dungeon death, dream unlock lets you ask her to cook.
- Early meal talk: Fine → progress toward steak → Meat Cuisine promise.
- Cook 3× meat (different meats = different dishes; meat-heavy route is the affection jackpot).
- Reward path includes Maiden's Smile — strong affection gains across the run.
Other easy recipes to start affection:
- 1 apple + 2 slime mucus
- 3 mushrooms (any type)
Gaming disturb trick: poke her while she’s gaming → event chain → follow with 2–3 comforting actions for extra promises. Save first.
T‑shirt and hot‑weather scenes
- Obtain T‑shirt, gift it (raises hot‑day event chance).
- Wait for a very hot day.
- Come home early — do not use Star Gate that day.
- With enough hearts, special scenes fire; purple 5–6 and 7 add variants if red trust is already there.
Optional: Atsu Bozu forces a scorching next day if you own it.
Bathroom scene (RNG)
- Roll suspicious vendor gacha for “pink stuff” (~5,000 coins per pull).
- During a bathroom interaction, combine with milk.
- RNG — save before the day, try different daily routines.

Philosopher’s Stone healing (late nights)
| Milestone | Source |
|---|---|
| First fragment | Abyss boss → melt via red door, mix with milk, start her recovery |
| Second tier | Bunny girl boss (ruined forest) → extend hours again |
| After two heals | Further fragments → use on yourself for stat/capacity stacks |
Ruins Floor 3 boss → Red Marrow Fluid starts healing arc and morning interactions (chance-based).

Night shop scenes
Some late content (horror movie, adult video) needs:
- Items from cat girl’s van (summon with Chariot tarot)
- Purple heart thresholds met


Pat head at home for favor — cheat gear Catalyst Amatoria (60dpat) is absurd if you use cheat codes.
Save points I actually use
- Before boss attempts
- Before hot day (if T‑shirt gifted)
- Before bathroom / gacha rolls
- Before disturb while gaming promise fishing
Back to hub.
Where I go next
- If I need related info, I use the 100% unlockables guide.
- If I need related info, I use the Cheat guide.
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