Heise Kuangxiangqu

A.Mou is young man who likes Wuxia and machinery. One day, when drawing manhua, he makes the mistake of dipping his pen into a bottle of "Thousand-year Ink" given to him by his childhood sweetheart, Shona. The two of them are then suddenly sucked into the world of the ink, where all of A.Mou's fantasies come true! Hidden in this fantasy world, however, is a threat that wants to wreck havoc. Out of control fantasies threaten the unsuspecting A.Mou like runaway trains that have lost their brakes...

(Source: Tong Li, translated)