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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

  1. After first dungeon death, dream unlock lets you ask her to cook.
  2. Early meal talk: Fine → progress toward steak → Meat Cuisine promise.
  3. Cook 3× meat (different meats = different dishes; meat-heavy route is the affection jackpot).
  4. 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

  1. Obtain T‑shirt, gift it (raises hot‑day event chance).
  2. Wait for a very hot day.
  3. Come home early — do not use Star Gate that day.
  4. 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)

  1. Roll suspicious vendor gacha for “pink stuff” (~5,000 coins per pull).
  2. During a bathroom interaction, combine with milk.
  3. RNG — save before the day, try different daily routines.

Suspicious vendor gacha — pink stuff rolls


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).

Philosopher's Stone Fragment — red door and milk mix


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

Chariot tarot — summon the cat girl's van

Horror videotape — late-night shop item example

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

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