Don't Come Yet, Okay?" Whispering Lewd Words To Her Sober Sister-in-law, She Performs Piston Cowgirl Position With Continuous Nakadashi Without Pulling Out! Hikari Tomoe

Two people suddenly become 'siblings' through remarriage. Hikari, a quiet step-sister whose thoughts are unreadable. At first, their relationship is awkward and they spend time with few words, but one day, a casual 'whisper' begins to change the distance between them. The step-sister's dirty talk whispered softly in the ear. The younger brother, unable to withstand the sudden temptation. The younger brother's rationality collapses, unable to resist the temptation at his sister's ear. He gradually falls deeper into his sister's flirtatious dirty talk.