The manga ending of 'Haven't You Heard? I'm Sakamoto' was both conclusive and heartwarming. It gave a proper send-off to the characters and their adventures, leaving readers with a lasting impression.
The number of volumes of 'Haven't You Heard? I'm Sakamoto' manga might vary depending on the region and editions. It's best to look up the information from official sources or dedicated manga platforms.
The 'Haven't You Heard? I'm Sakamoto' manga and anime have a lot in common. The anime follows the main plotlines and character developments from the manga closely. However, there are some small changes in the order of events or the emphasis on certain scenes to make it work better in the animated format.
Overall, the anime of 'Haven't You Heard? I'm Sakamoto' does a decent job of representing the manga. There are some visual differences and minor tweaks in the plot for better animation adaptation, but the core remains the same.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.