The fourth part of the NNG-004 school series tells a courses of cute girls who like to be licked.The number of attendants who transferred from ordinary preparatory schools this time 037 Serina sauce.She is a serious and smart type, and she is also a ... always shows a naughty smile, but she talks shyly about some naughty things.As a teacher, the most important thing is the ambition to pursue naughty things.Recently, oral sex has become more interesting Serina sauce, talent!Intersection-セ リ ナ ナ ん