It's a big "phew" for me. I really thought that they were be expelled for not being virgins anymore. Is really refreshing seeing them now, how different is they're relationship now and how they roles changed. Mio used to be the shy kouhai who looks for caress who's always gets flustered to talk with mature and confy senpai, and a potential bottom; becomed into a fragile girl in love, to finally turns into a sure girl who pampers her gilfriend, a total top. And Shizuka the senpai who looks sure and mature, a potential top; turned into a unmature and insecure girl fighting to leave the past where is deseve to be, to finally turn up into a sweet girlfriend who wants to be praised and pampered, a total bottom. Again, an story that used to make you feel like a pervert peeping on schoolgirls, demonstrates character's development that any other overhyped story would envy.