Unfortunately, two of the three couples follow those annoying anime-yaoi rules, i.e. rich and tall seme, childish uke, psuedo-rape is okay, even the gay characters acknowledge that being gay is not normal, etc. The lead couple, Misaki and Usami, and the third couple, Miyagi and Shinobu, are at times cute and at times creepy because of this.
So don't watch it for them! Watch it for the hilarious relationship between older, grumpy professor Kamijou and idealist medical student Nowaki. They defy most of the stereotypes and are very enjoyable to watch.
It's pretty interesting how the characters' paths cross randomly, and some of the little details are really cute and self-deprecating (like how Usami is trying to relive his childhood by strewing teddy bears across the apartment, Usami's shadow profession as a BL writer, the recurring wooden bear carvings).
