If you are reading this comment your parents will die within 5 years. To undo this curse you need to copy this and paste it on 5 other manga. i'm so, so sorry,please forgive me. (I SAW THIS ON ANOTHER MANGA SORRY I had to REPOST )
This one is comedic, slice of life Kinda fun to read but cant compare to urasawa thriller one tho So gram jigoro always showing off about his past, some of his story sound a lot like made up story. Nobody ever really know if all of gramps story is true or not. But some is proven right lol