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

The basement door was at the back of the workshop, behind a shelf of failed experimental goo. It was made of dark, petrified wood, etched with a single circle: Goddess’s Crest.

“Okay, system,” I muttered. “Open.”

A holographic prompt appeared:

[Workshop Master Sora Takumi – License Level 10 Confirmed.]
The basement is not a storage room. It is a ‘Second Layer Workshop.’ Access will consume 500 MP and activate emergency safety protocols. Proceed?
[YES] / [NO]

My MP was exactly 520. One wrong step, and I’d collapse.

I pressed [YES].

The floor didn’t open. The door didn’t swing. Instead, the entire workshop shuddered, and the stone floor beneath me descended—like an elevator made of compressed gravity. The walls blurred, and numbers flashed:

Descending: -10m … -50m … -200m …

At -200 meters, it stopped. The air was cool, metallic, and smelled of ozone. The basement door was at the back of

Short flashback: goddess’s parting words — the gift was meant to help, not replace. Foreshadow note that the goddess subtly expects the protagonist to set boundaries.

As of this article’s publication, Chapter 4 is available exclusively on:

Warning: Avoid low-quality scan sites. The intricate blueprints and margin notes (where Kouki writes his inner complaints) are often cropped out.

The exclusive release of Chapter 4 (first published in Monthly Shonen Isekai and early-access digital platforms) picks up immediately after the cliffhanger from Chapter 3. A roaming band of orcs has been detected near Kouki’s borrowed forest, and the village elder begs him for aid—not for combat, but for defensive fortifications.

The final page of Chapter 4 reveals a teaser for Chapter 5: The Labyrinth’s Heart & The Talking Hammer. Kouki must enter a dungeon, but rather than fighting, he plans to set up a mobile crafting outpost. The title alone promises more yarisugi seinou (overpowered performance) action.

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.

It offered a menu:

[Available Templates (Level 10)]

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.]

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:

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. [Workshop Master Sora Takumi – License Level 10 Confirmed

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

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

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…" My MP was exactly 520