A naughty student starved for love x a lewd teacher who enjoys streaming himself tied up A dangerous love where reason melts away in the pleasure of being tied up Koyama Yukiya is a cram school teacher who is loved by his students for his easy-going personality. He had a secret hobby called "self-bondage streaming." One day, the school's most mischievous student, Ryo Inui, finds out and he's in big trouble! Yukiya, whose weakness has been discovered, begs him to keep it a secret, but "If you want to be my sex friend, I'll keep quiet." He is forced to make the ultimate choice...!?

Koto, a high school girl who wants to become a fantasy illustrator, begins to see strange things around her one day. It seems to be related to her grandmother's former job as a "Kaiwanin," a teller of ghost stories…?