diff --git a/OPUS-BUILD-BRIEF.md b/OPUS-BUILD-BRIEF.md
index 23c36b0..fa953b1 100644
--- a/OPUS-BUILD-BRIEF.md
+++ b/OPUS-BUILD-BRIEF.md
@@ -58,10 +58,18 @@
   `reset()` restrings in place — Matter's constraint solve-order makes the
   restrung puppet marginally different but still walks fine (head stays ~400,
   floor 640).
-- **Next: M5** orders/days escalation (`game/orders.ts`-ish) — one new pressure
-  per day. Then **M6** juice (title, audio, string unlockables).
-- Run: `npm run dev` (:5173). Harness: `__s.playCleanRun() __s.playDisasterRun()
-  __s.serve() __s.anger(ev)` + all M1–M3 verbs. Headless: `npm run check`.
+- **M5 ✅** days + escalation. `DAYS` in `game/game.ts` — 5 days, each ONE new
+  pressure: (1) basics, (2) +1 ingredient (4 layers), (3) wetter (2× tomato),
+  (4) a real cut (katsu), (5) patience ramp (maxSeconds 45→22, angerRamp 1.8).
+  `Game.setDay(n)` loads order + ramp; sins scale by `samurai.ramp` (sheathing
+  doesn't). Exit-bar: `__s.playAllDays()` — every day beatable by a scripted-
+  honest run (all S, standing). Ramp bites: day 1 needs 7 crime-cuts to strike,
+  day 5 only 4. Verified in-browser.
+- **Next: M6** juice — title screen (「サンドニエット」brush art + SHUBATTO crawl +
+  attract ragdoll), Web Audio (shamisen sting / slash whoosh / wet splat), food
+  faces on pieces, string unlockables (rubber/chain/silk — pre-authorized defer).
+- Run: `npm run dev` (:5173). Harness: `__s.playDay(n) __s.playAllDays()
+  __s.playCleanRun() __s.playDisasterRun()` + all M1–M3 verbs. Headless: `npm run check`.
 
 
 
diff --git a/src/dev.ts b/src/dev.ts
index 7cada82..c22b558 100644
--- a/src/dev.ts
+++ b/src/dev.ts
@@ -1,6 +1,7 @@
 import type { Stage } from './scenes/stage';
 import { FLOOR_Y } from './scenes/stage';
-import { spawnFood } from './sim/food';
+import { spawnFood, FOODS } from './sim/food';
+import { DAYS } from './game/game';
 
 /**
  * Dev harness — toastsim's single most valuable organ, transplanted.
@@ -306,6 +307,32 @@ export function installHarness(stage: Stage): void {
       return { ...v, standing: stage.sando.stats().standing, order: stage.session.order.name };
     },
 
+    // ---- M5: days + escalation ---------------------------------------------
+    /** Play day `n` with a scripted-but-honest run: cut the filling, stack the
+     *  ordered layers, serve in time. Each day must stay beatable (B+). */
+    playDay(n = 0) {
+      this.freshRun();
+      const d = stage.session.setDay(n);
+      const order = stage.session.order;
+      const fill = order.layers.find((k) => k !== 'bread' && k in FOODS) ?? 'tomato';
+      this.chop(fill); // a clean cut feeds THE CUT
+      this.buildSando(order.layers.map((k) => [k, 0] as [string, number]));
+      const v = this.serve(true, Math.max(6, order.maxSeconds - 6));
+      return {
+        day: n + 1,
+        name: order.name,
+        pressure: d.pressure,
+        grade: v.grade,
+        total: v.total,
+        standing: stage.sando.stats().standing,
+      };
+    },
+
+    /** M5 exit-bar: every day introduces its pressure and is beatable (B+). */
+    playAllDays() {
+      return DAYS.map((_, i) => this.playDay(i));
+    },
+
     /** M4 exit-bar B: anger the samurai to the top → the string cut → ragdoll. */
     playDisasterRun() {
       this.freshRun();
diff --git a/src/game/game.ts b/src/game/game.ts
index d0428cc..a938f49 100644
--- a/src/game/game.ts
+++ b/src/game/game.ts
@@ -2,11 +2,25 @@ import type { Stage } from '../scenes/stage';
 import { Samurai } from '../sim/samurai';
 import { judge, type Order, type RunResult, type Verdict } from './judging';
 
-/** Day 1: one open tomato sando. Escalation is M5. */
-export const ORDERS: Order[] = [
-  { name: 'Open Tomato Sando', layers: ['bread', 'tomato', 'bread'], needsCut: true, maxSeconds: 40 },
+/** A day introduces exactly ONE new pressure (never two) and stays beatable by
+ *  a scripted-but-honest run. angerRamp scales every sin — the samurai's
+ *  patience shortens on the rush-hour day. */
+export interface Day {
+  order: Order;
+  pressure: string;
+  angerRamp: number;
+}
+
+export const DAYS: Day[] = [
+  { order: { name: 'Open Tomato Sando', layers: ['bread', 'tomato', 'bread'], needsCut: true, maxSeconds: 45 }, pressure: 'the basics', angerRamp: 1 },
+  { order: { name: 'Cheese & Tomato', layers: ['bread', 'cheese', 'tomato', 'bread'], needsCut: true, maxSeconds: 45 }, pressure: '+1 ingredient', angerRamp: 1 },
+  { order: { name: 'Double Tomato', layers: ['bread', 'tomato', 'tomato', 'bread'], needsCut: true, maxSeconds: 45 }, pressure: 'wetter — twice the tomato', angerRamp: 1 },
+  { order: { name: 'Katsu Sando', layers: ['bread', 'katsu', 'tomato', 'bread'], needsCut: true, maxSeconds: 45 }, pressure: 'a real cut — the katsu', angerRamp: 1 },
+  { order: { name: 'Rush Hour', layers: ['bread', 'tomato', 'bread'], needsCut: true, maxSeconds: 22 }, pressure: 'the patience ramp', angerRamp: 1.8 },
 ];
 
+export const ORDERS: Order[] = DAYS.map((d) => d.order);
+
 /**
  * The run controller. Holds the samurai + the current ticket, tallies the floor,
  * and turns a finished attempt into a Verdict. Kitchen sins feed the anger
@@ -14,7 +28,8 @@ export const ORDERS: Order[] = [
  */
 export class Game {
   samurai = new Samurai();
-  order: Order = ORDERS[0];
+  day = 0;
+  order: Order = DAYS[0].order;
   drops = 0;
   seconds = 0; // ticket timer (seconds)
 
@@ -22,7 +37,18 @@ export class Game {
     this.samurai.onStrike = () => this.stage.stringCut();
   }
 
-  reset(order: Order = ORDERS[0]): void {
+  /** Load day `n` (clamped): its order + its samurai patience ramp. */
+  setDay(n: number): Day {
+    this.day = Math.max(0, Math.min(DAYS.length - 1, n));
+    const d = DAYS[this.day];
+    this.order = d.order;
+    this.samurai.ramp = d.angerRamp;
+    this.drops = 0;
+    this.seconds = 0;
+    return d;
+  }
+
+  reset(order: Order = this.order): void {
     this.samurai.reset();
     this.order = order;
     this.drops = 0;
diff --git a/src/sim/samurai.ts b/src/sim/samurai.ts
index b2b3fe9..0bcf87e 100644
--- a/src/sim/samurai.ts
+++ b/src/sim/samurai.ts
@@ -24,6 +24,7 @@ export const PORTRAITS = ['samurai_calm', 'samurai_watch', 'samurai_annoyed', 's
 
 export class Samurai {
   anger = 0; // 0..1
+  ramp = 1; // day patience multiplier — sins hurt more on the rush-hour day
   struck = false;
   /** Fired once when the meter tops out — the stage wires the string cut here. */
   onStrike?: () => void;
@@ -32,10 +33,12 @@ export class Samurai {
   /** The last event, for barks. */
   last: AngerEvent | null = null;
 
-  /** Apply an anger event (optionally overriding the amount, e.g. ramped late). */
+  /** Apply an anger event (optionally overriding the amount, e.g. ramped late).
+   *  Sins scale by the day ramp; sheathing (a clean serve) does not. */
   bump(ev: AngerEvent, amount = ANGER[ev]): void {
     this.last = ev;
-    this.anger = Math.max(0, Math.min(1, this.anger + amount));
+    const scaled = amount > 0 ? amount * this.ramp : amount;
+    this.anger = Math.max(0, Math.min(1, this.anger + scaled));
     this.onChange?.(this.anger, this.stage);
     if (this.anger >= 1 && !this.struck) this.strike();
   }