Sarara and Yuyu are best friends who share everything. When Sarara learns Yuyu has a boyfriend, she confesses that she has always loved her and pushes their friendship into sex. After the boyfriend discovers them, he and Sarara compete for Yuyu, agreeing that she will choose whichever feels better: Sarara's strap-on or his bare cock. Strap-on expert Sarara's rapid technique leaves Yuyu convulsing through repeated orgasms, while Sarara takes pleasure from Yuyu's cock in return.