Yusuke Murata, the illustrator of One-Punch Man, posted some photos of the manga's 15th volume coming out on December 4th, 2017 on Twitter.
This time, he drew a certain character's certain scene for the volume.
The back of the volume's cover has a special illustration of Sonic having a hard time in restroom at his home.
...Take your time, Sonic.
The cover's folded part is the door, so that you can open it.
As you can see, he showed how to make it like the way of cutting the cover.
When you finish it, then put a tape or something on the back.
He recommends to use tapes which won't damage walls when you remove them.
Where will you put the toilet?
He made a pair of slippers for his restroom to make it look real.
Such a good idea.
He showed that there are characters in the book's back.
Front: Zombieman Back: Fubuki (Blizzard of Hell)
Why don't you buy two of the volume?
One for enjoying the Sonic's resting scene, and the other for adding to your bookshelf!
Oh, the wraparound band says the series has sold over 14 million copies!
Apparently, he plans to draw rooms for other characters as well.
Whose one will come next?
And what will the character be doing in the room?
I'm looking forward to the next room.
The manga, One-Punch Man is a remake of One-Punch Man written and illustrated by ONE.
The anime was aired from October to December, 2015.
It was announced that the anime got the 2nd season on September 25th, 2016.
The illustrator, Yusuke Murata is also known as the illustrator of Eyeshield 21.
ONE is known for his work, Mob Psycho 100 as well.