Episode 1 Mission! Build a boat and sail across the river! Page 6
Episode 2: The Sinking Ship, page 30
Episode 3: Mir's Hidden Cheat Key?! Page 52
Episode 4 Mission! Pass through 50 doors! Page 80
Episode 5: The Monster that Arrived in the Darkness, Page 100
Episode 6, Worst Difficulty, Page 120

Episode 1 Mission! Build a boat and sail across the river!
Mellow, Mir, and Melang arrive on a remote island! In the peaceful scenery, they hear the sound of someone diligently building something...? MISSION! Build a boat to cross the 5-stage river?! Mellow boasts that he'll make a cute rabbit boat just like himself, but the finished boat somehow resembles a different animal...?

Episode 2: The Sinking Ship
Mellow and Mir's boat finally set sail! They seemed to be making good progress through the calm river, but then they suddenly collided with a large rock! Mir's boat soon broke apart, the river water rushed in, and he began to sink...
How to survive on a sinking ship?!

Episode 3: Mir's Hidden Cheat Key?!
To make matters worse, increasingly terrifying obstacles appear! Moving gears, cannon-firing flowers, and even bombs falling from the sky?! In a worrying situation, Mir finds Mellowe constantly hiding something from him.
Mellow finds herself tormented by the fact that she keeps suspecting Mir without even realizing it… .

Episode 4 Mission! Pass through 50 doors!
This time, we arrived at a magnificent hotel?! But there's a strangely ominous and creepy aura. MISSION! Pass through 50 doors?! Huh? Really, all I have to do is pass through the doors? It's a piece of cake! Can it really be this easy?

Episode 5: A Monster Arrives in the Darkness
This time, another challenging mission begins! The more doors I open, the more terrifying and horrifying monsters burst out! And on top of that, the lights suddenly go out, leaving me trapped in pitch-black darkness?! Please, save me!

Episode 6: The Worst Difficulty
At first, we started out with quite a few users, but now there are only a few left, and everyone's will and hopes are quickly dashed.
Is this mission truly possible? And what terrifying event awaits in the final room?

*Appendix page
Character Diary with Mellow
It contains great tips to help you learn and follow Mellow's positive mindset.
From small lifestyle habits that build confidence and self-esteem, to wisely reconciling with friends, to learning how to break bad habits, and even learning how to prepare for leadership, let's cultivate a broader mind with Mellow!

A mind map that I personally participate in
It contains a mind guide that allows you to examine every corner of your heart.
Get a little closer to me by writing down your heart guide!

Surprise Reader Participation Event! Mellow Fan Art
This book contains fan art selected through a fan art contest! What would Mellow, filled with the love of fans, look like? Find out in the book!