RBD-927 New Slave Castle 7

It's been two years since we started dating. Sachiko (Sasakura) begins to think about marrying her colleague, teacher Tadashi, but Tadashi doesn't propose to her, and she is frustrated every day. At that time, Tadashi receives an email from her former student Abe... Sachiko secretly peeks at her even though she thinks it's wrong. Along with her extortion message, a photo of Tadashi touching Eri's (Maeda) buttocks, who was also a student, is attached.