The fire demon Chong Wuyan injured the eye of the water demon Chi Mo during the war. After the war, in order to express his apology, Chong Wuyan came to Chi Mo's home to take care of Chi Mo, who was blind, and tolerated Chi Mo's various (like) teasing actions towards him. Unexpectedly, an accident allowed Chong Wuyan to see through the Chi family's conspiracy. Angrily, he left Chi Mo, who pretended to be blind, but he didn't know that this was also a conspiracy...
PS: There is also the second volume "Water is Combustible" (the counterattack of the grumpy little Balrog). This is the first volume.
Concept: Water and fire can actually blend together