Pretty simple story. Wholesome, overall a pleasant time. Unless you’re uncomfortable with certain subjects in fiction, then it’s not.
In case you didn’t read the title: yes this is shota manga. As in one of the main characters is a child. And it’s heavily implied throughout the story that he gets together with his much older (high school age) peer as a child. If that’s not for you, I highly recommend skipping this one
Shota Oni