Really, I could read this one over and over and over again. It's hilarious, and the characters are amazing. The story is a fantastic read with a mix of light and heavy moments. And parts like Satou's back story which could have turned into melodramatic messes are handled with care.
While Yoshida and Satou do follow up to a certain extent the old stereotypical BL couple with the seme being amazing at everything and with the uke being completely weak, I think their personalities makes them stand out amidst other BL crap. I completely ** love ** how Yoshida isn't the usual whiny uke who can't deal with his very dominant seme, and Satou has a very dominant personality. Yoshida is adorable as other reviewers have stated, and while some may have trouble with Satou's sadism, I think that it's fairly toned down compared to other sadists in yaoi. I don't think Satou would ever hurt Yoshida in a horrible way or humiliate him. There's very little angst, as Yoshida accepts that he is in a relationship and doesn't sit around, cry, and push back Satou's advances like many of the irritating ukes in BL do. You can tell they're very much in love with each other. It's a heart-warming relationship to me.
The story itself is episodic, but within each episode you get character development and some lovely Yoshida x Satou (keep in mind this is * shounen-ai * so don't expect anything too explicit). Tanaka Suzuki is one of the few BL authors I've read who is amazing at comedy and is pretty good at drama. AnD is a very funny read, and can be touching at times.
Overall, one of the best shounen-ai I've read, with great characters, lovely relationships, and a very funny story. While I had read some shounen-ai before like Seven Days, this one was really the one that got me onto the BL boat. Also, see if you can listen to the drama cd's - they're really well done.