I'll Give It My All...Tomorrow(2007)

Ore wa Mada Honki Dashitenai Dake

Shizuo Oguro is living his dreams… sort of. A complete waste of a human life until now, forty-year-old Shizuo breaks free from the corporate rat race and charts himself a fairly random and new career course: to become a published manga artist. Sure, he lacks the talent, discipline, or any other skill necessary to become a success in the manga industry—but that's not enough to stop Shizuo!

(Source: VIZ Media)