Mr. Endo and Mr. Takeuchi are teachers working at the same high school. They're sleeping together, but they aren't dating. While they're compatible in bed, Mr. Takeuchi wants more than just sex. Mr. Endo can't be bothered, and tells him, "We're done now, so hurry up and get out," hurting Mr. Takeuchi... One day, a student, Tanuma, catches them in the act! Mr. Endo urges Tanuma to join, telling him what to do, and they end up in a threesome!! Tanuma, who secretly yearns for Mr. Takeuchi, loses control seeing him like that... The cool fox in glasses, the cute-as-a-rabbit romanticist, and the lovesick puppy get wrapped in a love triangle.

from Renta!