Jinrui wa Suitai Shimashita: Nonbirishita Houkoku

Nonbirishita Houkoku is a manga adaptation of the Humanity Has Declined story starring The Mediator and her Grandpa. It's a single volume series with 6 chapters in total. The manga also acts as the debut of Caravan Guy.

The following stories are included:

The Definition of God: An abbreviated version of The Fairy's Earth. The Mediator abducts some fairies from the scrapyard and begins to befriend them. The fairies mistake her for a God and they debate what this would mean.

The Rainbow Disc: The Mediator finds an old CD and wonders what music the people of the past listened to. She meets with Caravan Guy and receives more discs, but is unable to procure a CD player. As it continues to occupy her mind, a fairy helps out by playing the CD through magic.

The Chestnut Crown: Grandpa grows annoyed with eating the same meal every day while The Mediator becomes obsessed with making Marron Glacé, even though she doesn't know what it is. She attempts to make them, but encounters several setbacks including an incident where the fairies get drunk on rum. After a lot of work, she ends up making a Mont Blanc instead.

The Roll of the Dice: During a shopping trip at Caravan Guy's shop The Mediator finds a Go set and Grandpa challenges Caravan Guy to a few games. After beating Grandpa, Caravan Guy challenges The Mediator and is soundly beaten, even though she claims not to know the game. They end up playing several other board games, only to be repeatedly beaten by The Mediator. The following day, the fairies develop an interest in gambling and won't let her leave until they beat her in a game.

To Take Medicine: Grandpa comes down with a cold, but is stubborn about taking his medicine and staying inside. He is repeatedly apprehended, but ditches his medicine in a pot of sugar. A fairy spy catches him in the act, and The Mediator tricks her Grandpa into pouring the medicine back in his porridge later that day. However, she ends up sick herself the following day.

Sewing and Wearing: The Mediator acquires a sewing machine and has Caravan Guy modify it so she can make clothes for the fairies. She is repeatedly nagged to repair Grandpa's Long Johns instead and the fairies turn out to have a strange fashion sense. She falls asleep while making clothes and the fairies take over, repairing Grandpa's pants. The following day The Mediator is happy to see the fairies wear the clothes she made, but they all decided to wear Long Johns on top of them.

Trivia

 * The scoreboard during The Roll of the Dice uses the pronouns "Watashi" (polite, gender neutral) for The Mediator, Washi (Elderly person) for Grandpa, and Ore (masculine) for Caravan Guy.
 * Romeo Tanaka handled the story of the manga, but art was provided by Takuya Mitomi.