Sensei ga No.1 Host!? Yoru no Sekai no Kimochi Ii Koto Oshiete Ageru My Teacher's... the No.1 Host?!

Synopsis

My homeroom teacher is the number 1 host in our town!? My pure innocent body is eager to learn his ways. Lesson by lesson he wraps me around his gentle fingers ad teaches me all of his "nightly" techniques that you wouldn't hear about in a normal classroom. (Source: WWWave Corporation)