Manami, who is introduced to her sister's best friend Aoi, one day sneaks up on her sister in the kitchen, squeezes Manami's breasts, and performs a tongue attack on Aoi. Having decided to stay at her house, she sneaks into Manami's room, wets her nipples with saliva until her tank top is damp, and licks her sweaty crotch. The two of them loved each other until dawn with mutual handjobs, and from that day on, they secretly, and sometimes boldly, indulged in cunnilingus and shell matching, drenching their young skin in love juice.