Tsuiraku jk to haijin kyoshi is a very unique shoujo manga with refreshing male mc and female mc. If you are tired of the same troupes and cliches of every shoujo mangas this is definitely worth a try as it uses the cliches in a great manner.
First the story is very simple a forbidden relationship between a teacher and a student and what I liked about the story is how they addressed the age gap and the moments between the characters are really natural. Another thing which appealed to me about the story was its sense of humor. I guess these types of comedy is called'dark humour' not too familiar with the term. As for the art it's spectacular all the good scenes are drawn beautifully. The cover pages are really cute.
As for its characters mikoto ochiai- I'm a big fan of kuuderes mikoto is a really good female lead. I love how her commentary is and her deadpan jokes and her gloomy nature. And what I liked about her is that she isn't dense
Haijin- lazy , good for nothing , a slacker, a stalker etc... There are so many things which are bad about him but thats what makes him really interesting. Despite all the bad points his love for mikoto and how indirectly he supports her in her relationships despite being possessive and how he knows his boundary. His backstory is pretty sad. (It's not the same melodramatic stuff )
The side characters were also pretty good like takamine, nazuna and her brother, mikotos siblings etc. They r fun to read.
As for the negative aspects of the show if you are not a fan of the humor or think the story is a drag then it's not recommended for you
Overall I really enjoyed the show and it's episodic pacing. I'm really curious how their relationship will turn out once mikoto graduates.