Ichigenme... The First Class is Civil Law Vol. 2
Fumi Yoshinaga (Author)

The (apparently) frivolous Tohdou and the (overly) serious Tamiya continue to collide after graduation. But with Tohdou working on his PHD thesis and Tamiya an assistant professor at the university, the two rarely have time for each other, let alone sex.Luckily, Tohdou's younger brother, Hiroaki, has just entered law school and is a student in Tamiya's class. While Hiroaki is the younger of the two siblings, his conquests are many: and he's more than happy to provide his older brother with some much needed love/sex advice. Join Tamiya, Tohdou and Tohdou's younger brother as they find love and deal with the twists and turns of life.