Manga by author Nakamura Uzuki

A teacher named Kadomae Kazuma has the principal's daughter Noeda Kanade for his class in a new school semester. At first glance, she appears to be a quiet girl, but she's awakening her aberrant love towards Kazuma!? This is a psycho love story that accelerates thoughts and actions!

"R" or rather Room 402 is the room where our illustrious female main character lives. One day which seems to be by mere coincidence her fate intertwines with that of Sasamoto, a savvy man who seems to be down in the dumps. That is until he picks up a trinket which fell from her nether regions. Prepare yourself for a story of sexual psychological horror as Sasamoto enters into a brave new world.