Manga Isekai No Sumikko De Kaiteki Monozukuri Seikatsu Megami Sama No Kureta Koubou Wa Chotto Yarisugi Seinou Datta Chapter 4 Exclusive -

Chapter 4 — "Blueprints and Boundaries"

Chapter 4 Exclusive: "The Hidden Function"

The chapter opens on a deceptively quiet morning. Ruru is enjoying his usual routine: waking up in the loft of his workshop, brewing herb tea using his own self-heating kettle, and sketching blueprints for a new spinning wheel.

Page 4 – The First Sign of Trouble: While carving a delicate gear for the spinning wheel, Ruru accidentally pricks his finger on a chisel. A single drop of blood falls onto the workshop’s central workbench—an ancient, rune-etched table he assumed was decorative.

The runes glow crimson. A system window (yes, this manga uses a gentle RPG mechanic) appears, but this time, the text is different:

"Workshop Authority Override: Artisan’s Blood Pact Confirmed. Activating [Absolute Production Mode]. Warning: Spatial Efficiency Protocols Disengaged."

The "Chotto Yarisugi" Moment: Within seconds, the workshop expands. Not in physical size from the outside—but internally. The cozy 3-meter-square shed now contains a cavernous interior the size of a warehouse. New tools materialize: a hydraulic press, a chemical distillation array, and a loom that can weave carbon-fiber-like thread from common grass.

Ruru’s reaction is classic sumikko (corner) energy: he panics, curls up behind his favorite shelf, and mutters, "I just wanted to make a spinning wheel…" Chapter 4 — "Blueprints and Boundaries" Chapter 4

Scene 1 — Morning: A Workshop Too Perfect

Opening panel: wide shot of the goddess’s workshop at dawn — rows of gleaming tools, organized shelves, and faint magical sigils still glowing. Protagonist (calm, practical isekai transposed artisan) stands at the doorway, stunned.
Quick inner monologue: grateful but wary — the goddess’s gift feels like a solution that removes all friction, not a chance to grow.
Beats:
- They test a simple hammer from the bench; it auto-adjusts grip and balance. Crafting speed doubles. A nearby apprentice’s nervous glance shows awe.
- Protagonist remembers past struggles (learning curves, small triumphs). Decision bubbles: Use it to help others, or hide it and craft the way they used to?

Why Chapter 4 Is a Game-Changer for the Series

Unlike earlier chapters that focused on personal comfort (perfecting coffee brewing, building an auto-sorting bookshelf), Chapter 4 expands the scope. The keyword kaiteki monozukuri seikatsu (comfortable crafting life) is tested. Can Kouki maintain his cozy corner if his creations keep escalating?

The chapter introduces two major long-term arcs:

Resource Scarcity: The workshop’s territory expansion drained 70% of its mana reserves. Kouki must now venture into a nearby labyrinth to harvest high-grade mana crystals.
Political Attention: A messenger from the kingdom arrives in the final panel, having witnessed the gate’s power. He kneels and says, “The King requests your workshop’s aid in the northern war.”

The chapter ends with Kouki sighing, holding a cup of self-warming tea, and muttering, “So much for a quiet life.”

Part 3: The First Illegal Craft

I spent two hours exploring the basement. The four crafting stations were incredible—the Forge could melt mythril ore in seconds, the Loom could spin spider silk into elemental robes, and the Distillery could age 100-year wine in ten minutes.

But the Core Forge was the true monster. The "Chotto Yarisugi" Moment: Within seconds, the workshop

It offered a menu:

[Available Templates (Level 10)]

Iron Sword (D-Rank) → 1 day lifespan

Healing Potion+ (C-Rank) → 1 day

Fire Rod (B-Rank) → 3 days

Gate Key: Labyrinth Entrance (A-Rank) → 7 days

??? (S-Rank locked)

I needed the Labyrinth Key to get Longevity ingredients. But 7 days of my life? I was 29. Not old, but not young.

Then I noticed a checkbox at the bottom:

[Use ‘Mana Substitute’ – Convert 10,000 MP instead of 1 day lifespan.] warm like a heartbeat.

I had 520 MP.

“Tch. Useless.”

But wait. The Distillery could make Mana Potions (B-Rank) in 10 minutes. If I automated the process…

For the next 12 hours, I set up a loop:

Distillery makes Mana Potion (10 min).
I drink it → MP fully restored.
Use 10,000 MP as substitute for 1 day of lifespan.
Core Forge crafts the Labyrinth Key (A-Rank).

It worked. I lost zero days of life. But my body ached—the mana conversion strained my soul. By the 7th “payment,” my vision blurred and I vomited blue light.

But in my hand: a black iron key, warm like a heartbeat.

[Gate Key: Crimson Labyrinth – First Floor] acquired.