If you're looking for manga similar to Kusatta Kyoushi No Houteishiki, you might like these titles.
Adorable Atsushi has just enrolled in a brand-new school so he can finally be reunited with his first, true love! But what if the man he’s sure is the one... isn’t at all?! Will another beautiful new face catch Atsushi’s eye and steal his innocent heart? Class is now in session…and there’s no telling who’s gonna get the highest marks!
Both the anime and the manga are the same franchise; for some reason Anime-Planet didn't connect the two as the same thing.
Both are great, I suggest watching the anime first and then reading the manga. The anime gives you a clue to what's going on, but the manga has much more to the story and it gets very interesting!
"I am your fighter"--In front of Aoyagi Ritsuka, there is a boy that named himself as Loveless fighter -- Seiryo Yukiharu -- appears.Since he has the same voice as his deceased brother, Ritsuka opens his heart to Seiryo's tenderness. But, when he felt the warmth of Agatsuma Soubi's hand, he was attacked by anxiety. Was it okay to let Soubi's hand go? Who is the partner with I want to have a strong connection? When Ritsuka hesitates with this, real love and bonds are tested.
Uchiha Sasuke journeys to the Howling Wolf Village, where Itachi's eye medicine was produced.
Hatsumi Narita lives in a typical company housing complex with her seemingly typical family, but the dramatic turn her life is about to take is anything but, well, typical. Her precocious younger sister Akane is way too popular with boys, her childhood friend Azusa, now a hunky male model, might want to ruin her life, her super-mean and very privileged neighbor Ryoki considers her his slave, and her dreamy older brother Shinogu might not be what he seems at all. What is a hapless heroine to do?