It's been two years since they started dating. Shoko (Sasakura) began to think about marrying her colleague, the teacher Tada, but he wouldn't propose, leaving her in a state of anxiety. Just then, an email from his former student Aemi (あべ) arrived on Tada's phone… Though she knew it was wrong, Shoko couldn't help but sneak a peek. Attached to the blackmail message was a photo of Tada groping Eri (Maeda), another former student.
