Inuyashiki

If you’ve ever seen that internet meme of an anime character shaking down a terrified woman about how fire the latest chapter of One Piece is (based), that scene comes from Inuyashiki, a sci-fi manga with a lot more revealing personality checks than how liking One Piece means you’re not afraid of commitment.
Inuyashiki, by Hiroya Oku, is a sci-fi drama about a friendless baby boomer named Ichirou Inuyashiki. After having a good cry at the park while taking his dog for a walk, Ichirou discovers an extraterrestrial object that gives him a mechanical body. The rest of the story follows Ichirou’s harrowing journey as a neighborhood superhero struggling to maintain his humanity.