[Ogawa Hidari] On Sundays it's just the two of us (COMIC LO 2010-09)

Every Sunday Kouhei is left in charge of Shino, the adorable little girl next door who adores him, and their innocent playtime turns into fingering, a first blowjob and her very first time with him buried deep inside her. Between piggyback rides and crayon drawings the defenceless pair can't keep their hands off each other, with Shino happily taking his nakadashi like it's the most natural thing in the world. But when that very night brings news their parents are marrying, the two soon-to-be siblings seal it with a kiss, wondering if doing this as family might be a bit strange.