It's mainly a tale of a complex relationship and interactions between a student and a professor. You'll find elements of drama, learning, and maybe a touch of romance.
I'm not sure specifically as I haven't read this exact novel. But generally, in such a story, it might involve a romantic relationship between a student and a professor who is also an alpha mate. There could be elements of forbidden love, power dynamics, and the challenges that come with such an unusual pairing.
Since I'm not familiar with the 'Professor Sada story', it could be about his academic achievements. Perhaps he made a great discovery in his research area, like in science, he might have found a new species or developed a new theory. Or in the humanities, he could have written a very influential book on history or culture.
In 'my professor is my alpha mate novel', the main character is surely the one who has the professor as an alpha mate. This character might be a young, impressionable student. The professor, being the alpha mate, is another key character. There could be other characters like classmates who notice the strange relationship developing, or family members who have different reactions to the situation. These additional characters can add depth and complexity to the story.
The me & my brothers manga is quite different from the common ones. It offers a deeper exploration of emotions within the family context. Also, the art style and plot progression have their own charm that sets it apart.
This is a very unusual and potentially disturbing topic. It's hard to say without more context. Maybe it's just a misunderstanding or a plot twist in the manga.