Powerful orgasms instead of algebra

Sweet brunette struggles with her math task but she fails again and again. Finally, she comes up to an idea of asking her boyfriend for help. So she calls him and begs him to save her. Dude takes the pen and solves everything easily. Dark-haired sweetie feels very much excited and tries to think out a way to thank her man. Luckily he knows what he needs and that leads to a very passionate sex break with many crazy games.