" Hakoniwa Oukoku No Craft Master " av Nanamomo Rio.
Kallas också: Craftmaster of Miniature Garden Kingdom , Creator-sama av Little Garden Kingdom Craft och Hakoniwa Oukoku no Souzoushu-sama .
An Otaku programmer who spent the last three years creating the world he desires on the computer suddenly encounters a BUG. He gets depressed and sleeps. When he wakes up, he finds himself in his own world with crafting power.
Det första han byggde var verkligen en vakttorn, resten matchar också.