[Manga] Jagaaaaaan!

Read it here
Shintarou Jagasaki, who is a neighborhood police officer, lives with his girlfriend while working a job that is killing him slowly with annoyance. It looks like he will end up marrying soon and live a boring life with a nuclear family - a grim future for a guy with dreams! One such day, a mysterious monster appeared on the train and he suddenly can shoot with his right hand like Master Buppanatsu, the eggplant mascot of his city!

read the first chapter,
and didn't like it that much.

I actually enjoyed this...I agree it can be way too simple in plot at times but the facial expressions make up for it. It's like the artist took junji ito's facial design to some degree mixed with Hiroya Oku's amount of violence!