This is a short comic set after the No More Heroes video game, and it is set before No More Heroes 2: Desperate Struggle.
No More Heroes 1.5 is also the debut of the Unknown Travis look-alike character. He is killed by Travis Touchdown so he does not return.
Videos:
The comic can be seen on youtube at: https://www.youtube.com/watch?v=NQwUN9nOAvo