Waka is a sober and quiet female university student with a bust of 100cm. Her sister Satori was secretly in love with her best friend Hikaru. One night, Hikaru, who was supposed to hold her study session, rubbed her Waka's big boobs while Satori was sleeping, and made Waka squid with cunnilingus and hand man. Hikaru is happy to have become one with her Waka, who has been thinking about her, but Satori, who has doubts about her sister, questions her Waka. Not knowing that she is in a love triangle, Hikaru actively seeks her Waka's body...
